Maybe something a bit too continue reading, Nothing like a healthy doctor visit, getting all checked out, make sure everythings in working order, inside and out. There is limited information regarding Nonclinical Toxicology of Selenium sulfide in the drug label. [8], The most stable and dense form of selenium is gray and has a chiral hexagonal crystal lattice (space group 152 or 154 depending on the chirality)[12] consisting of helical polymeric chains, where the Se-Se distance is 237.3pm and Se-Se-Se angle is 103.1. }}. Although New Zealand soil has low levels of selenium, adverse health effects have not been detected in the residents. Selenium sulfide has been used as an insecticide, fungicide, and herbicide. [17], Selenium disulfide is available in the form of a prescription drug as a 2.5% medical shampoo. Common adverse reactions include . [59][60], About 2,000tonnes of selenium were produced in 2011 worldwide, mostly in Germany (650t), Japan (630t), Belgium (200t), and Russia (140t), and the total reserves were estimated at 93,000tonnes. It was initially introduced as replacement for sulfur due to its similarities and lack of adverse usage characteristics (oiliness and smell). Selenium is very rarely found as an element in the ground. Selenium Sulfide Topical Suspension USP, 2.5% (Lotion) is intended for external use only. [71] These detectors use amorphous selenium to capture and convert incident x-ray photons directly into electric charge.[72]. It seldom occurs in its elemental state or as pure ore compounds in the Earth's crust. |sort=Pill Name [61], Researchers found that application of selenium fertilizer to lettuce crops decreased the accumulation of lead and cadmium. Scientific Facts: Selenium is a naturally occurring mineral element found in rocks and soil. By using our services, you agree to our use of cookies. WikiDoc is not a professional health care provider, nor is it a suitable replacement for a licensed healthcare provider. It rarely occurs in its elemental state or as pure ore compounds in There is no FDA guidance on the use of Selenium sulfide with respect to pediatric patients. Illustrative selenides include mercury selenide (HgSe), lead selenide (PbSe), zinc selenide (ZnSe), and copper indium gallium diselenide (Cu(Ga,In)Se2). |?Label Name [15][16], Selenium disulfide can cause discoloration of nails and light hair[7] and can alter the color of hair dyes. Selenium is a component of the amino acids selenocysteine and selenomethionine. It is used to make medicated shampoos. There is no FDA guidance on the use of Selenium sulfide in patients with hepatic impairment. Massage about 1 or 2 teaspoonsful of suspension into wet scalp. Under ordinary circumstances Selenium Sulfide Topical Suspension USP, 2.5% (Lotion) should not be used for the treatment of tinea versicolor in pregnant women. It is also used [7][8][9], Selenium disulfide was approved for medical use in the United States at least as early as 1951. |sort=Label Page Selenium does not exhibit the changes in viscosity that sulfur undergoes when gradually heated. [61][63], The largest commercial use of Se, accounting for about 50% of consumption, is for the production of glass. [142] Also, selenium interacts with other minerals, such as zinc and copper. [7][26][27] It can be synthesized by the reaction of selenium tetrachloride (SeCl4) with [((CH3)3Si)2N]2Se. 6. In soils, selenium most often occurs in soluble forms such as selenate (analogous to sulfate), which are leached into rivers very easily by runoff. It is insoluble in water. Note that this may not provide an exact translation in all languages, Home Case reports of temporary diffuse hair loss with selenium disulfide shampoo exist as well. Top 10 Uses of SeleniumAutomated testing. Earlier, people used to do manual testing which used to be a big headache. Important Benefits. Less burden and stress for testers As mentioned above, the amount of time required to do testing repeated test scenarios on each and every new build Reduction in Human resources. Several supplementary services. Fast and accurate. More items [131] Hydrogen selenide is an extremely toxic, corrosive gas. Cookies help us deliver our services. WHEN USED ON BODY SURFACES FOR THE TREATMENT OF TINEA VERSICOLOR, SELENIUM SULFIDE IS CLASSIFIED AS PREGNANCY CATEGORY "C". A liquid antiseborrheic, antifungal preparation for topical application. )[123], Selenium may be measured in blood, plasma, serum, or urine to monitor excessive environmental or occupational exposure, to confirm a diagnosis of poisoning in hospitalized victims, or investigate a suspected case of fatal overdose. Zinc selenide was the first material for blue LEDs, but gallium nitride dominates that market. The new brass is marketed under the name EnviroBrass. [87] Fish are a major source of protein for humans, people who eat more fish are generally healthier than those who eat less, indicating selenium pollution does not appear to be a problem, although it might be useful to be aware that selenium has a potential effect on humans. Jump search Mixture selenium sulfides.mw parser output .infobox subbox padding border none margin 3px width auto min width 100 font size 100 clear none float none background color Selenium sulfide appears to have a cytostatic effect on cells of the epidermis and follicular epithelium, thus reducing corneocyte production. [2][3]It is applied to the The selenocysteine-containing form occurs in species as diverse as green algae, diatoms, sea urchins, fish, and chickens. For the treatment of tinea versicolor, seborrheic dermatitis of the scalp, and dandruff. This process leaches natural soluble selenium compounds (such as selenates) into the water, which may then be concentrated in wetlands as the water evaporates. WebSelenium sulfide also referred to as Selenium disulfide is a liquid antiseborrheic and antifungal preparation that should only be used topically. Selenium may have a chemo-preventive role in cancer risk as an anti-oxidant, and it might trigger the immune response. They are, thus, involved in thyroid-hormone regulation, participating in the protection of thyrocytes from damage by H2O2 produced for thyroid-hormone biosynthesis. Selenium sulfide is a popular seborrheic dermatitis treatment commercially available only in wash-off formulations. [148], The effects of selenium intake on cancer have been studied in several clinical trials and epidemiologic studies in humans. Avoid getting shampoo in eyes or in contact with genital area as it may cause irritation and burning. In humans, selenium is a trace element nutrient that functions as cofactor for reduction of antioxidant enzymes, such as glutathione peroxidases[98] and certain forms of thioredoxin reductase found in animals and some plants (this enzyme occurs in all living organisms, but not all forms of it in plants require selenium). It would be continue reading, This one goes out to all my thirsty hoes. Vegan Foods With SeleniumEnriched Foods. Certain products, such as pasta, whole wheat bread, and whole-grain cereal provide a good amount of selenium content as well as other important vitamins and minerals.Brown Rice. Sunflower Seeds. Baked Beans. Mushrooms. Oatmeal. Spinach. Lentils. Cashews. Bananas. More items In fact, the angiosperms (the dominant type of plant today) and most of their antioxidant pigments evolved during the late Jurassic period. [21], Selenium disulfide should not be applied to damaged skin as there is a risk of systemic absorption and associated toxicity. There is no FDA guidance one the use of Selenium sulfide in patients who are immunocompromised. DermNet provides Google Translate, a free machine translation service. Hydrogen sulfide reacts with aqueous selenous acid to produce selenium disulfide: Selenium disulfide consists of 8-membered rings. A group of academics, therefore, tried to use this brand of shampoo to stop an alien invasion after discovering that the alien life form was sensitive to selenium. The chief commercial uses for selenium today are glassmaking and pigments. Selenium is a semiconductor and is used in photocells. Applications in electronics, once important, have been mostly replaced with silicon semiconductor devices. Selenium is still used in a few types of DC power surge protectors and one type of fluorescent quantum dot. Small amounts of organoselenium compounds have been used to modify the catalysts used for the vulcanization for the production of rubber.[58]. In low doses, selenium has shown a beneficial effect on plant resistance to various environmental stress factors including drought, UV-B, soil salinity, and cold or hot temperatures. Selenium sulfide is toxic by ingestion and inhalation, and is irritating to skin and eyes. Selenium often causes a malformed fish fetus which may have problems feeding or respiring; distortion of the fins or spine is also common. The specific chemicals contain a variable number of S and Se atoms, SenS8n. Urea hydrates and is useful for conditions such as dry scalp. Selenium sulfide treats the excess shedding and irritation by eliminating excess scalp fungus and controlling the rate of shedding of dead skin cells. These species are structurally analogous to the corresponding disulfur dichloride. 4. Selenium compounds commonly exist in the oxidation states 2, +2, +4, and +6. [126] This 400g Tolerable Upper Intake Level is based primarily on a 1986 study of five Chinese patients who exhibited overt signs of selenosis and a follow up study on the same five people in 1992. Topics AZ Stop using the preparation and check with your doctor if you experience scalp irritation or skin irritation. [15] It was a three-arm trial of 246 people with moderate to severe dandruff and compared treatment with 2% ketoconazole shampoo (n=97), 2.5% selenium disulfide shampoo (n=100), and placebo (shampoo base with no antiseborrheic agent) (n=49) for 29days. Also, people dependent on food grown from selenium-deficient soil are at risk. [6], Selenium forms several allotropes that interconvert with temperature changes, depending somewhat on the rate of temperature change. [147] Neonate ruminants at risk of white muscle disease may be administered both selenium and vitamin E by injection; some of the WMD myopathies respond only to selenium, some only to vitamin E, and some to either. It is listed as an essential medicine by the World Health Organization. [137], Selenium deficiency can occur in patients with severely compromised intestinal function, those undergoing total parenteral nutrition, and[138] in those of advanced age (over 90). 2. For this purpose, various selenite and selenate salts are added. 1. [8], The red , , and forms are produced from solutions of black selenium by varying the evaporation rate of the solvent (usually CS2). This smell was not typical of arsenic, but a similar odor was known from tellurium compounds. Selenium is found in metal sulfide ores, where it partially replaces the sulfur. [57] This changes the availability of selenium because only a comparably small part of the selenium in the ore is leached with the copper. [30] Both chemists owned a chemistry plant near Gripsholm, Sweden, producing sulfuric acid by the lead chamber process. The pyrite from the Falun Mine created a red precipitate in the lead chambers which was presumed to be an arsenic compound, so the pyrite's use to make acid was discontinued. |?Pill Color There is no FDA guidance on the use of Selenium sulfide with respect to specific gender populations. |format=template There is limited information regarding Off-Label Guideline-Supported Use of Selenium sulfide in adult patients. Phytoplankton can concentrate inorganic selenium by a factor of 3000. [65] Like lead and sulfur, selenium improves the machinability of steel at concentrations around 0.15%. Selenium sulfide is a bright orange colored powder. [2][5] Use in pregnancy or breastfeeding has not been studied. For lot number and expiration date see label or bottom of container. However, as used in proprietary formulations, it is not a pure chemical compound but a mixture of eight-membered-ring compounds where the overall Se:S ratio is 1:2. In humans, selenium is a trace element nutrient that functions as cofactor Hence, Berzelius's first letter to Alexander Marcet stated that this was a tellurium compound. [55][56] Since its invention, solvent extraction and electrowinning (SX/EW) production of copper produces an increasing share of the worldwide copper supply. The contents of this FDA label are provided by the National Library of Medicine. Anwar Hossain, Ken Touhata, Takeshi Yabu, and Yumiko Yamashita. Is there anything Trent Marx doesnt deliver? [5] It is on the World Health Organization's List of Essential Medicines. Sources of pollution include waste materials from certain mining, agricultural, petrochemical, and industrial manufacturing operations. [105] Evidence suggests that the molecular mechanisms of mercury toxicity includes the irreversible inhibition of selenoenzymes that are required to prevent and reverse oxidative damage in brain and endocrine tissues. A reduction of 21% on TPO antibodies is reported with the dietary intake of 0.2mg of selenium. There is limited information regarding Monitoring of Selenium sulfide in the drug label. PHARMACOKINETICS: The mechanism of action of topically applied selenium sulfide is not yet known. Michiaki Yamashita, Shintaro Imamura, Md. These materials are semiconductors. Selenium disulfide, also known as selenium sulfide, is a chemical compound and medication used to treat seborrheic dermatitis, dandruff, and pityriasis versicolor. This coal was shown to have selenium content as high as 9.1%, the highest concentration in coal ever recorded.[129]. For salmon, the optimal concentration of selenium is about 1 microgram selenium per gram of whole body weight. they are not mapped one onto another by any symmetry operation), and in fact in the -monoclinic form, half the rings are in one configuration (and its mirror image) and half in another. Analysis of blood levels of inorganic compounds in the supplement indicated the selenium concentrations were 10 to 15 times higher than normal in the blood samples, and 15 to 20 times higher than normal in the liver samples. Selenium from Greek seln ( 'Moon') was discovered in 1817 by Jns Jacob Berzelius, who noted the similarity of the new element to the previously discovered tellurium (named for the Earth). [92] Elevated dietary methylmercury levels can amplify the harm of selenium toxicity in oviparous species. Selenium was the basis of the very first solar cells, with the first example of rooftop solar being a selenium cell from 1884. [1] It consists of a mixture of inorganic covalent compounds having an approximate empirical formulas of SeS2. WebPharmacokinetics: The mechanism of action of topically applied selenium sulfide is not yet known. Selenium disulfide, also known as selenium sulfide, is a chemical compound and medication used to treat seborrheic dermatitis, dandruff, and pityriasis versicolor. [2] Systemic symptoms may include tremors, weakness, lethargy, lower abdominal pain, and occasional vomiting. The 1,2 isomer can be prepared by reaction of chlorosulfanes and dichlorodiselane with potassium iodide in carbon disulfide. Do not leave on hair, scalp or skin for periods longer than directed and ensure all selenium sulfide is rinsed off well. [29], Selenium (Greek selene meaning "Moon") was discovered in 1817 by Jns Jacob Berzelius and Johan Gottlieb Gahn. Did Holy-Shit-Hot French Pro Tennis Stars Fabien Reboul and Maxence Broville Just Come Out As A Couple?! [69] The LiSe battery is an alternative to the lithiumsulfur battery, with an advantage of high electrical conductivity. Inorganic selenium bioaccumulates more readily in phytoplankton than zooplankton. The demand for selenium by the electronics industry is declining. [93][94], Although it is toxic in large doses, selenium is an essential micronutrient for animals. When applied to the body for treatment of tinea versicolor, Selenium Sulfide Topical Suspension USP, 2.5% (Lotion) may produce skin irritation especially in the genital area and where skin folds occur. Selenium dichloride is an important reagent in the preparation of selenium compounds (e.g. There is limited information regarding Off-Label NonGuideline-Supported Use of Selenium sulfide in pediatric patients. Some commonly used brand names are Selsun, Exsel and Head and Shoulders Intensive Treatment. Sheets of amorphous selenium convert X-ray images to patterns of charge in xeroradiography and in solid-state, flat-panel X-ray cameras. [17] The non-primordial radioisotope 79Se also occurs in minute quantities in uranium ores as a product of nuclear fission. It is more acidic than H2S. Selenium sulfide is a antiseborrheic and dermatological agent that is FDA approved for the treatment of tinea versicolor, seborrheic dermatitis of the scalp, and dandruff. Selenium sulfides are a group of 8 memebered ring compounds, with the general formula Se8-n Sn. Common There is no FDA guidance on the use of Selenium sulfide with respect to specific racial populations. [86], Selenium pollution might impact some aquatic systems and may be caused by anthropogenic factors such as farming runoff and industrial processes. At low levels, it is used in the body to create anti-oxidant selenoproteins, at higher doses than normal it causes cell death. WebSelsun Blue 2-in-1 Anti-dandruff Shampoo & Conditioner, 11 fl. These areas should be thoroughly rinsed after application. Animal reproduction studies have not been conducted with Selenium Sulfide Topical Suspension USP, 2.5% (Lotion). [150], This article is about the chemical element. N c s dng cho kem dng da hoc du gi u. There is limited information regarding FDA-Labeled Use of Selenium sulfide in pediatric patients. Repeat application and rinse thoroughly. |?Pill Name Selenium is a chemical element with the symbol Se and atomic number 34. [7][21] The discoloration resolved shortly following discontinuation of selenium disulfide shampoo and its removal could be facilitated by lightly swabbing with isopropyl alcohol. the preparation of Se7). Talk to your doctor about the effects of taking alcohol with this medication. This set index page lists chemical compounds articles It is also not known whether Selenium Sulfide Topical Suspension USP, 2.5% (Lotion) can cause fetal harm when applied to body surfaces of a pregnant woman or can affect reproduction capacity. On 19 April 2009, 21 polo ponies died shortly before a match in the United States Polo Open. [18][19] In the United States, a 1% strength is available over-the-counter, and a 2.5% strength is also available with a prescription. There is limited information regarding IV Compatibility of Selenium sulfide in the drug label. Hazards What is this information? |mainlabel=- |?Pill Dosage [4] It is on the World Health Organization's List of Essential Medicines. The educational content on WikiDoc drug pages is based upon the FDA package insert, National Library of Medicine content and practice guidelines / consensus statements. |?Drug Author It is prepared by treating selenium with sulfuryl chloride (SO2Cl2). Books about skin diseasesBooks about the skin With strong reducing agents, it forms polyselenides. These data exclude two major producers: the United States and China. Three days later, a pharmacy released a statement explaining that the horses had received an incorrect dose of one of the ingredients used in a vitamin/mineral supplement compound that had been incorrectly prepared by a compounding pharmacy. You need your mouth filled, something long and hard and fleshy sliding between your lips, over your tongue, and down your throat. It contains selenium in its +4 [132] Selenium also occurs in organic compounds, such as dimethyl selenide, selenomethionine, selenocysteine and methylselenocysteine, all of which have high bioavailability and are toxic in large doses. Also naturally occurring is the long-lived primordial radionuclide 82Se, with a half-life of 9.21019 years. [53], Anthropogenic sources of selenium include coal burning, and the mining and smelting of sulfide ores. Selenium sulfide. There is limited information regarding Pharmacodynamics of Selenium sulfide in the drug label. various regions within North America) where low selenium soil levels lead to low concentrations in the plants, some animal species may be deficient unless selenium is supplemented with diet or injection. It is a nonmetal (more rarely considered a metalloid ) with properties that are intermediate between the elements above and below in the periodic table, sulfur and tellurium, and also has similarities to arsenic. [4] Symptoms frequently return if treatment is stopped. Selenium's semiconductor properties found numerous other applications in electronics. [ 1][ 2][ 3] WikiDoc does not promote the administration of any medication or device that is not consistent with its labeling. The isomer n-butane can connect in two ways, giving rise to two "-butyl" groups: . Selenium is bioaccumulated in aquatic habitats, which results in higher concentrations in organisms than the surrounding water. [113] Marine fishes and vertebrate thyroid glands have the highest concentration of selenium and iodine. For every tonne of manganese, an average 2kg selenium oxide is used. WebSulfeto de selnio ( portugus brasileiro) ou sulfeto de selnio ( portugus europeu) (mais precisamente dissulfeto de selnio ou sulfeto de selnio (IV)) o composto de frmula qumica SeS 2 . [10][11] The packing is most dense in the form. Repeat treatments as directed by physician. [15][16] A randomized controlled trial of 100 people who received selenium disulfide reported side effects of itching or burning sensation of the scalp (3people), eruption near the hairline (1person), psoriasis (1person), lightening or bleaching of hair color (2people), orange staining of the scalp (1person), and a chemical taste while shampooing (1person). |template=DrugLabelImages Isolated selenium deficiency is now being investigated for its role in induction autoimmune reactions in thyroid gland in Hashimoto's disease. Another naturally occurring organoselenium compound is dimethyl selenide. Application to skin or scalp may produce skin irritation or sensitization. The consumption in 2010 was divided as follows: metallurgy 30%, glass manufacturing 30%, agriculture 10%, chemicals and pigments 10%, and electronics 10%. [24] Selenium reacts with fluorine to form selenium hexafluoride: In comparison with its sulfur counterpart (sulfur hexafluoride), selenium hexafluoride (SeF6) is more reactive and is a toxic pulmonary irritant. Selenium sulfide is an antifungal medication. [6] Selenium disulfide acts as a keratolytic and antifungal agent. However, the lack of tellurium compounds in the Falun Mine minerals eventually led Berzelius to reanalyze the red precipitate, and in 1818 he wrote a second letter to Marcet describing a newly found element similar to sulfur and tellurium. Do not use if your scalp or the skin to be treated is cut or scratched. Selenous acid can also be made directly by oxidizing elemental selenium with nitric acid:[20], Unlike sulfur, which forms a stable trioxide, selenium trioxide is thermodynamically unstable and decomposes to the dioxide above 185C:[7][20], Selenium trioxide is produced in the laboratory by the reaction of anhydrous potassium selenate (K2SeO4) and sulfur trioxide (SO3).[21]. Allow to remain on scalp for 2 to 3 minutes. Much below that level, young salmon die from deficiency;[135] much above, they die from toxic excess. Selenium can be refined from these muds by a number of methods. Editor-In-Chief: C. Michael Gibson, M.S., M.D. Bernd E. Langner "Selenium and Selenium Compounds" in Ullmann's Encyclopedia of Industrial Chemistry, 2005, Wiley-VCH, Weinheim. The regulation of lead in drinking water applications such as in the US with the Safe Drinking Water Act of 1974, made a reduction of lead in brass necessary. Selenium sulfide | SSe - PubChem Apologies, we are having some trouble retrieving data from our servers PUGVIEW FETCH ERROR: 403 Forbidden National Center for Biotechnology It has an approximate composition of SeS2, with individual rings varying in composition, such as Se4S4 and Se2S6. [citation needed], The deiodinase isoenzymes constitute another family of eukaryotic selenoproteins with identified enzyme function. Upon heating, it softens at 50C and converts to gray selenium at 180C; the transformation temperature is reduced by presence of halogens and amines. Some analytical techniques are capable of distinguishing organic from inorganic forms of the element. [5] It consists of a mixture of inorganic covalent compounds having an approximate empirical formulas of SeS2. Salts of selenous acid are called selenites. Occupational Safety and Health Administration, National Institute for Occupational Safety and Health, Magnetic susceptibility of the elements and inorganic compounds, "The NUBASE2016 evaluation of nuclear properties", "Lettre de M. Berzelius M. Berthollet sur deux mtaux nouveaux", "Effect of light on selenium during the passage of an electric current", "The need for selenite and molybdate in the formation of formic dehydrogenase by members of the Coli-aerogenes group of bacteria", "How Selenium Has Altered Our Understanding of the Genetic Code", 10.1579/0044-7447(2007)36[94:SGAH]2.0.CO;2, "How to use the world's scarce selenium resources efficiently to increase the selenium concentration in food", "Public Health Statement: Selenium Production, Import/Export, Use, and Disposal", "Chemistry: Periodic Table: selenium: key information", "Selenium and Tellurium: Statistics and Information", "Radiography of Welds Using Selenium 75, Ir 192 and X-rays", "Aquatic selenium pollution is a global environmental safety issue", "Mercury, selenium and fish oils in marine food webs and implications for human health", "Review of selenium toxicity in the aquatic food chain", "A teratogenic deformity index for evaluating impacts of selenium on fish populations", "Selenium accumulation protects plants from herbivory by Orthoptera via toxicity and deterrence", "Selenium concentrations in leaf material from Astragalus Oxyphysus (diablo locoweed) and Atriplex Lentiformis (quail bush) in the interior Coast Ranges and the western San Joaquin Valley, California", Linus Pauling Institute at Oregon State University, "Effect of Selenium on Thyroid Disorders: Scientometric Analysis", "Dietary and tissue selenium in relation to methylmercury toxicity", "Post-transcriptional defects of antioxidant selenoenzymes cause oxidative stress under methylmercury exposure", "Protective effect of selenite against methylmercury toxicity: observations concerning time, dose and route factors in the development of selenium attenuation", "Inhibition of the human thioredoxin system: A molecular mechanism of mercury toxicity", Strong antioxidant activity of the novel selenium-containing imidazole compound selenoneine, "Discovery of the strong antioxidant selenoneine in tuna and selenium redox metabolism", "Mercury: selenium interactions and health implications", "Selenocysteine-containing proteins in mammals", "Evolutionary dynamics of eukaryotic selenoproteomes: large selenoproteomes may associate with aquatic life and small with terrestrial life", "Evolution of Dietary Antioxidant Defences", "Reconsidering the evolution of eukaryotic selenoproteins: a novel nonmammalian family with scattered phylogenetic distribution", "The microbial selenoproteome of the Sargasso Sea", "FDA Issues Final Rule to Add Selenium to List of Required Nutrients for Infant Formula", "Selenium stimulates the antitumour immunity: Insights to future research", "Dietary Supplement Fact Sheet: Selenium", "Public Health Statement: Health Effects", "Polo pony selenium levels up to 20 times higher than normal", "CDC NIOSH Pocket Guide to Chemical Hazards Selenium", "Effect of micronutrient status on natural killer cell immune function in healthy free-living subjects aged 90 y", "Selenium and iodine supplementation of rural Tibetan children affected by Kashin-Beck osteoarthropathy", "Serum Selenium Status and Its Interrelationship with Serum Biomarkers of Thyroid Function and Antioxidant Defense in Hashimoto's Thyroiditis", "Selenium deficiency mitigates hypothyroxinemia in iodine-deficient subjects", National Institutes of Health page on Selenium, CDC NIOSH Pocket Guide to Chemical Hazards, https://en.wikipedia.org/w/index.php?title=Selenium&oldid=1123158494, Chemical elements with trigonal structure, Articles with dead external links from November 2020, Short description is different from Wikidata, Articles containing Swedish-language text, Articles to be expanded from February 2022, Articles with unsourced statements from June 2016, Pages using Sister project links with hidden wikidata, Creative Commons Attribution-ShareAlike License 3.0, grey metallic-looking, red, and vitreous black (not pictured) allotropes, This page was last edited on 22 November 2022, at 06:06. Selenium hexasulfide is a chemical compound with formula Se2S6. In 1954, the first hints of specific biological functions of selenium were discovered in microorganisms by biochemist, Jane Pinsent. Selenium sulfide 2.5% strength is used also on the body to treat tinea versicolor (a type of fungus infection of the skin). To the knowledge of researchers, there are no reports of mercury levels exceeding that of selenium levels in ocean fish. Selenium sulfide can be used safely on the scalp in pregnant women. [49][50], Certain soils are selenium-rich, and selenium can be bioconcentrated by some plants. [15][16] Based on the study, the systematic review concluded that selenium disulfide may be effective in the treatment of dandruff but that the available evidence is limited and overall evidence quality is low. Further concentration through bioaccumulation occurs along the food chain, as predators consume selenium rich prey. Allow to remain on skin for 10 minutes. During the 1980s, selenocysteine was shown to be encoded by the codon UGA. [15] Consequently, the review concluded that selenium disulfide should not be considered as a first-line therapy but instead should be used as an alternative treatment after other therapies like ketoconazole shampoo have proven not effective. In the Se8 rings, the Se-Se distance varies depending on where the pair of atoms is in the ring, but the average is 233.5 pm, and the Se-Se-Se angle is on average 105.7. Selenous acid is bubbled with sulfur dioxide (reduction step) to give elemental selenium. Reactivity Alerts none Air & Water Reactions Slightly water soluble. [25][26][27][28][29] However, application of selenium disulfide to damaged skin can result in systemic absorption and has been associated with cases of toxicity. For External Use Only. It is applied to the affected area as a lotion or shampoo. Selenium disulfide, also known as selenium sulfide, is a chemical compound and medication used to treat seborrheic dermatitis, dandruff, and pityriasis versicolor. Selenium rectifiers were first used in 1933. At the Kesterson National Wildlife Refuge in California, thousands of fish and waterbirds were poisoned by selenium in agricultural irrigation drainage. Selenium pollution of waterways also occurs when selenium is leached from coal flue ash, mining and metal smelting, crude oil processing, and landfill. [79], Selenium is a catalyst in some chemical reactions, but it is not widely used because of issues with toxicity. The common mineral selenite is not a selenium mineral, and contains no selenite ion, but is rather a type of gypsum (calcium sulfate hydrate) named like selenium for the moon well before the discovery of selenium. No, I continue reading, Those pouty eyes, those doughy lips, and that hunky attitude. Selenium disulfide has been used in shampoo as an antidandruff agent, an inhibitor in polymer chemistry, a glass dye, and a reducing agent in fireworks. Not only are his looks sensually unique, he can take a dick (or many) very Lucas Entertainment, bringing us high-end gay porn since 1998, is at it again bringing you a wildly hot time with Alpha Cum. Gu thng [2]. For treatment of tinea versicolor: Apply to affected areas and lather with a small amount of water. There are several isomers depending on the relative placement of the selenium atoms in the ring: 1,2 (with the two Se atoms adjacent), 1,3, 1,4, and 1,5 (with the Se atoms opposite). Selenium is incorporated into several prokaryotic selenoprotein families in bacteria, archaea, and eukaryotes as selenocysteine,[111] where selenoprotein peroxiredoxins protect bacterial and eukaryotic cells against oxidative damage. WebIn OTC drug products, Selenium Sulfide also helps to control dandruff, seborrheic dermatitis and psoriasis. Selenium is a semiconductor and is used in photocells. If it connects at one of the two terminal carbon atoms, it is normal butyl For treatment of dandruff and seborrheic dermatitis of the scalp: 1. It is a strongly odiferous, toxic, and colorless gas. ), and false goldenweed (Oonopsis sp. It is a nonmetal (more rarely considered a metalloid) with properties that are intermediate between the elements above and below in the periodic table, sulfur and tellurium, and also has similarities to arsenic. Selenium sulfide preparations are usually well tolerated. [15][16] The study found a 73% reduction in dandruff score with ketoconazole, a 67% reduction with selenium disulfide, and a 45% reduction with placebo. |?Pill Scoring The preparation should not be applied more frequently than required to maintain control. Selenium sulfide. Unlike the other allotropes, it is insoluble in CS2. China is the largest consumer of selenium dioxide for this purpose. [111] Marine organisms retained and sometimes expanded their selenoproteomes, whereas the selenoproteomes of some terrestrial organisms were reduced or completely lost. High doses of Se supplements in pregnant animals might disturb the Zn:Cu ratio and lead to Zn reduction; in such treatment cases, Zn levels should be monitored. This inorganic compoundrelated article is a stub. DermNet does not provide an online consultation service. Selenium is most commonly found as an impurity, replacing a small part of the sulfur in sulfide ores of many metals. Native (i.e., elemental) selenium is a rare mineral, which does not usually form good crystals, but, when it does, they are steep rhombohedra or tiny acicular (hair-like) crystals. [33][34] This led to its use as a cell for sensing light. These include silver selenite (Ag2SeO3) and sodium selenite (Na2SeO3). Though once widely used, selenium rectifiers have mostly been replaced (or are being replaced) by silicon-based devices. Ele usado como agente antifngico em xampus para o tratamento da dermatite seborrica e caspa associadas a fungos do gnero Malassezia. Cybersocket got the dish on this stud in our latest 7 Sexy Questions continue reading, Over at Family Dick, weve previously seen a couple incarnations of the stepdad/son relationship between Derek Allen and Myott Hunter. Drug Information: Selenium Sulfide (Topical), Apply enough selenium sulfide shampoo to the scalp to, Allow lather to remain on scalp for 2-3 minutes before rinsing off, Repeat with a second wash then rinse well, Use 1% or 2.5% shampoo twice a week for the first 2 weeks, then once weekly for 2, 3 or 4 weeks, and then only when necessary, Apply selenium sulfide lotion to affected areas of the body (do not apply to face or genitals), Work up a lather using a small amount of water, Allow the medicine to stay in contact with your skin for about 10 minutes, Rinse body well to remove all the medicine, Use the 2.5% lotion once per day for 7 days, Unusual oiliness or dryness of hair or scalp. Seleni disulfide. [10] Selenium disulfide is available as a generic medication and over the counter. WebSelenium is a chemical element with the symbol Se and atomic number 34. Its molecular structure consists of a ring of two selenium and six sulfur atoms, analogous to the S8 allotrope of sulfur (cyclooctasulfur) and other selenium sulfides with formula SenS8n.[2]. Signs and symptoms of selenosis include a garlic odor on the breath, gastrointestinal disorders, hair loss, sloughing of nails, fatigue, irritability, and neurological damage. In Belews Lake North Carolina, 19 species of fish were eliminated from the lake due to 150200g Se/L wastewater discharged from 1974 to 1986 from a Duke Energy coal-fired power plant. May be irritating to mucous membranes of the eyes and contact with this area should be avoided. Tetraselenium tetranitride, Se4N4, is an explosive orange compound analogous to tetrasulfur tetranitride (S4N4). FDA-Labeled Indications and Dosage (Adult), FDA-Labeled Indications and Dosage (Pediatric), Females of Reproductive Potential and Males. Adult fish may appear healthy despite their inability to produce viable offspring. This film features 11 of Bel Alam Wernik has become one of the most popular bottoms in current porn, rightfully so. [108][109] It seems as though when mercury levels in a marine fish rise, so do the selenium levels. In the United States, Selenium disulfide was approved for medical use as early as 1951. Iodides of selenium are not well known. [2] Selenium disulfide appears to be much less toxic than other selenium salts, which may be attributed to its low aqueous solubility and very poor systemic absorption. [1] Use is not recommended in children less than 25 years old. COMMON BRAND NAME (S): Exsel, Tersi Foam Minerals that are pure selenide or selenate compounds are known but rare. Most selenium in soil is in a very tiny amount. Other selenium allotropes may contain Se6 or Se7 rings. Other problems include degeneration of liver tissue, swelling around the heart, damaged egg follicles in ovaries, cataracts, and accumulation of fluid in the body cavity and head. This one does too, but it a really good way like in a two boxes of Kleenex way. Especially common are selenides (R2Se, analogues of thioethers), diselenides (R2Se2, analogues of disulfides), and selenols (RSeH, analogues of thiols). |?Pill Shape It is toxic by ingestion and inhalation, and is irritating to skin and eyes. Its use as a photoconductor in plain-paper copiers once was a leading application, but in the 1980s, the photoconductor application declined (although it was still a large end-use) as more and more copiers switched to organic photoconductors. [36], Selenium sulfide is under development for the treatment of meibomianitis (meibomian gland dysfunction) and dry eyes in topical and ophthalmic formulations. Selenium poisoning can be passed from parents to offspring through the egg, and selenium poisoning may persist for many generations. |?Pill Ingred DermNet does not provide an online consultation service.If you have any concerns with your skin or its treatment, see a dermatologist for advice. [15], A 2015 review recommended topical antifungal agents, topical corticosteroids, and topical calcineurin inhibitors like tacrolimus as the main treatments for seborrheic dermatitis based on good-quality evidence, rather than selenium disulfide for which evidence is much more limited. By contrast, selenates and selenites have an oxidant mode of action similar to that of arsenic trioxide and are very toxic. This was followed by the discovery of selenocysteine in proteins. There is no Australian Drug Evaluation Committee (ADEC) guidance on usage of Selenium sulfide in women who are pregnant. [7][8][9], Selenium disulfide was approved for medical use in the United States at least as early as 1951. Fire Hazard selenium, vanadium, magnesium, copper, and zinc, may have been lacking in some terrestrial mineral-deficient areas. [3][14], A 2015 systematic review of topical treatments for seborrheic dermatitis of the scalp identified only a single randomized controlled trial evaluating selenium disulfide for the condition. [47][48], In living systems, selenium is found in the amino acids selenomethionine, selenocysteine, and methylselenocysteine. |?Drug Name Selenium transmits an electric current proportional to the amount of light falling on its surface. For other applications, a red color may be desired, produced by mixtures of CdSe and CdS. |mainlabel=- [133], In fish and other wildlife, selenium is necessary for life, but toxic in high doses. Selenium is listed as an ingredient in many multivitamins and other dietary supplements, as well as in infant formula, and is a component of the antioxidant enzymes glutathione peroxidase and thioredoxin reductase (which indirectly reduce certain oxidized molecules in animals and some plants) as well as in 3 deiodinase enzymes. [58], Industrial production of selenium usually involves the extraction of selenium dioxide from residues obtained during the purification of copper. This product should not be used by patients allergic to any of its components. Commercially, selenium is produced as a byproduct in the refining of these ores, most often during production. The lithiumselenium (LiSe) battery is one of the most promising systems for energy storage in the family of lithium batteries. 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