Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Chemical compound
A disulfite, commonly known as metabisulfite or pyrosulfite, is a chemical compound containing the ion S 2O2− 5. It is a colorless dianion that is primarily marketed in the form of sodium metabisulfite or potassium metabisulfite. When dissolved in water, these salts release the hydrogensulfite HSO− 3 anion. These salts act equivalently to sodium hydrogensulfite or potassium hydrogensulfite.[2]
^ abInternational Union of Pure and Applied Chemistry (2005). Nomenclature of Inorganic Chemistry (IUPAC Recommendations 2005). Cambridge (UK): RSC–IUPAC. ISBN 0-85404-438-8. p. 130. Electronic version.
^Johnstone, H. F. (1946). "Sulfites and Pyrosulfites of the Alkali Metals". Inorganic Syntheses. Inorganic Syntheses. Vol. 2. pp. 162–167. doi:10.1002/9780470132333.ch49. ISBN 9780470132333.
A disulfite, commonly known as metabisulfite or pyrosulfite, is a chemical compound containing the ion S 2O2− 5. It is a colorless dianion that is primarily...
odour. It is mainly used as an antioxidant or chemical sterilant. As a disulfite, it is chemically very similar to sodium metabisulfite, with which it...
precipitates as a yellow solid. With more SO2, the solid dissolves to give the disulfite, which crystallises upon cooling. SO2 + 2 NaOH → Na2SO3 + H2O SO2 + Na2SO3...
of the anion with formation of metabisulfite (S 2O2− 5), also known as disulfite: 2 HSO− 3 ⇌ S 2O2− 5 + H2O Because of this equilibrium, anhydrous sodium...
precipitates as a white solid. With more SO2, the solid dissolves to give the disulfite, which crystallizes upon cooling. SO 2 + 2 NaOH ⟶ Na 2 SO 3 + H 2 O {\displaystyle...
structure is HO−S(=O)2−S(=O)−OH. The salts of disulfurous acid are called disulfites or metabisulfites. Disulfurous acid is, like sulfurous acid (H2SO3), a...
crystallize the product yield sodium metabisulfite (also called sodium disulfite), Na2S2O5. Upon dissolution of the metabisulfite in water, bisulfite is...
system space group unit cell volume density optical references tricalcium disulfite sulfate dodecahydrate Orschallite Ca3(SO3)2SO4•12H2O 2:1 rhombohedral...
the sulfur atom bonded to 3 oxygen atoms), +3 (of other sulfur atom) Disulfite commonly known as metabisulfite, S 2O2− 5 Not known. Sulfurous acid H2SO3...
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