The S-S distance indicates a single bond, implying that the terminal sulfur holds a significant negative charge and the S-O interactions have more double-bond character. 5H2O is also a component of iodine clock experiments. Two polymorphs are known of the pentahydrate. This reaction has been employed to generate colloidal sulfur. In pH testing of bleach substances, sodium thiosulfate neutralizes the color-removing effects of bleach and allows one to test the pH of bleach solutions with liquid indicators. In this short piece of article, we will be looking more into the sodium thiosulfate formula, its chemical structure along with its properties and uses. This process is used to demonstrate the concept of reaction rate in chemistry classes. This is a white crystalline solid that is highly soluble in water and odourless too. To learn more formulas of various chemical compounds, subscribe to BYJU’S! Specifically, a double bond is … It is also used in estimating volumetrically the concentrations of certain compounds in solution (hydrogen peroxide, for instance) and in estimating the chlorine content in commercial bleaching powder and water. [13] The alkylthiosulfates are susceptible to hydrolysis, affording the thiol. The other name for the compound is sodium hyposulfite. If available as the pentahydrate state then its molecular weight will become 248.18 g/mol. Sodium Thiosulfate is an inorganic compound that has a chemical formula Na 2 S 2 O 3. This particular use can be set up to measure the oxygen content of water through a long series of reactions in the Winkler test for dissolved oxygen. This can be defined as the antidote for treating cyanide poisoning. The product is used for several pharmaceutical preparations and it has a plenty of medical properties too. It is used to dechlorinate tap water including lowering chlorine levels for use in aquariums, swimming pools, and spas (e.g., following superchlorination) and within water treatment plants to treat settled backwash water prior to release into rivers. [9][2] Thiosulfate forms strong soluble complexes with gold(I) ions, [Au(S2O3)2]3−. Under normal conditions, acidification of solutions of this salt excess with even dilute acids results in complete decomposition to sulfur, sulfur dioxide, and water:[10]. This reaction is known as a "clock reaction", because when the sulfur reaches a certain concentration, the solution turns from colorless to a pale yellow. The relevant reaction is akin to the iodine reaction: thiosulfate reduces the hypochlorite (active ingredient in bleach) and in so doing becomes oxidized to sulfate. It is used for both film and photographic paper processing; the sodium thiosulfate is known as a photographic fixer, and is often referred to as 'hypo', from the original chemical name, hyposulphite of soda. 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Sodium thiosulfate and ammonium thiosulfate are a component of an alternative lixiviants to cyanide for extraction of gold. Maths Formulas - Class XII | Class XI | Class X | Class IX | Class VIII | Class VII | Class VI | Class V Algebra | Set Theory | Trigonometry | Geometry | Vectors | Statistics | Mensurations | Probability | Calculus | Integration | Differentiation | Derivatives Hindi Grammar - Sangya | vachan | karak | Sandhi | kriya visheshan | Vachya | Varnmala | Upsarg | Vakya | Kaal | Samas | kriya | Sarvanam | Ling. This reaction is illustrated by one synthesis of thioglycolic acid: InChI=1S/2Na.H2O3S2/c;;1-5(2,3)4/h;;(H2,1,2,3,4)/q2*+1;/p-2, InChI=1/2Na.H2O3S2/c;;1-5(2,3)4/h;;(H2,1,2,3,4)/q2*+1;/p-2, Except where otherwise noted, data are given for materials in their, World Health Organization's List of Essential Medicines, Institute for Occupational Safety and Health, https://en.wikipedia.org/w/index.php?title=Sodium_thiosulfate&oldid=983064125, World Health Organization essential medicines, Chemical articles with multiple compound IDs, Multiple chemicals in an infobox that need indexing, Chemical articles with multiple CAS registry numbers, Pages using collapsible list with both background and text-align in titlestyle, Articles containing unverified chemical infoboxes, Creative Commons Attribution-ShareAlike License, 48.3 °C (118.9 °F; 321.4 K) (pentahydrate), 100 °C (212 °F; 373 K) (pentahydrate, - 5H, This page was last edited on 12 October 2020, at 01:18. As it is used for medical purposes, so it is not toxic but when it is decomposed then releasing harmful oxide fumes and causes irritation to eyes or skin as well. Thiosulfate has a central sulfur atom surrounded by three oxygen atoms and one sulfur atom. Sodium thiosulfate is a highly important inorganic compound and it is suitable for plenty medical uses. Thiosulfate (S 2O 3) (IUPAC-recommended spelling; sometimes thiosulphate in British English) is an oxyanion of sulfur. The advantages of this approach are that (i) thiosulfate is essentially nontoxic and (ii) that ore types that are refractory to gold cyanidation (e.g.