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CAS No 16731-55-8 , Potassium metabisulfite

  • Name: Potassium metabisulfite
  • Synonyms: Dipotassium pyrosulfite;Potassium metabisulfite; Potassium pyrosulfite; Dipotassium disulfite; Dipotassium disulphite; 16731-55-8;Potassium disulfite;
  • CAS Registry Number:
  • Safety Statements: Experimental reproductive effects. A very irritating material. Questionable carcinogen with experimental tumorigenic data. Mutation data reported. When heated to decomposition it emits toxic fumes of SOx and K2SO3. See also SULFITES.
  • Hazard Symbols: Xi: Irritant;
  • EINECS: 240-795-3
  • Molecular Weight: 222.3236
  • InchiKey: RWPGFSMJFRPDDP-UHFFFAOYSA-L
  • InChI: InChI=1S/2K.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5)/q2*+1;/p-2
  • Risk Statements: 31-36/37/38
  • Molecular Formula: K2O5S2
  • Molecular Structure:CAS No:16731-55-8 Potassium metabisulfite

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References of Potassium metabisulfite
Title: Potassium Metabisulfite
CAS Registry Number: 16731-55-8
CAS Name: Potassium pyrosulfite
Molecular Formula: K2O5S2
Molecular Weight: 222.32
Percent Composition: K 35.17%, O 35.98%, S 28.85%
Line Formula: K2S2O5
Literature References: The article of commerce contains ~95% K2S2O5.
Properties: White crystals or cryst powder; sulfur dioxide odor; acid reaction; liberates SO2 with acids; oxidizes in air to sulfate, more readily in presence of moisture. It may catch fire if much heat develops in powdering it. Freely sol in water; insol in alcohol. Keep dry and well closed.
Use: As antifermentative in breweries and wineries; bleaching straw; preservative for fruits and vegetables.