Potassium metabisulfite

Base Information

• Chemical Name: Potassium metabisulfite
• CAS No.: 16731-55-8
• Deprecated CAS: 4429-42-9
• Molecular Formula: K2O5S2
• Molecular Weight: 183.22
• Hs Code.: 28322000
• European Community (EC) Number: 240-795-3
• ICSC Number: 1175
• UN Number: 1759
• UNII: 65OE787Q7W
• DSSTox Substance ID: DTXSID1021293
• Nikkaji Number: J43.952E
• Wikipedia: Potassium metabisulfite
• Wikidata: Q417881
• RXCUI: 1362899
• ChEMBL ID: CHEMBL2106901
• Mol file: 16731-55-8.mol

Synonyms:potassium metabisulfite

Chemical Property of Potassium metabisulfite

Chemical Property:

• Appearance/Colour: White to slightly yellowish fine cryst. powder
• Melting Point: 190 °C
• PSA: 124.92000
• Density: 2.34 g/cm3
• LogP: 0.27220
• Storage Temp.: Store at +5°C to +30°C.
• Sensitive.: Air Sensitive
• Solubility.: H2O: 0.1 M at 20 °C, clear, colorless
• Water Solubility.: Soluble in water. Insoluble in ethanol.
• Hydrogen Bond Donor Count: 0
• Hydrogen Bond Acceptor Count: 6
• Rotatable Bond Count: 0
• Exact Mass: 221.8461284
• Heavy Atom Count: 9
• Complexity: 136
• Transport DOT Label: Corrosive

Purity/Quality:

99% ^*data from raw suppliers

Potassium metabisulfite ^*data from reagent suppliers

Safty Information:

• Pictogram(s): Xi
• Hazard Codes: Xi
• Statements: 31-36/37/38-41
• Safety Statements: 26-36-39

MSDS Files:

SDS file from LookChem

Total 1 MSDS from other Authors

Useful:

• Chemical Classes: Other Classes -> Sulfites
• Canonical SMILES: [O-]S(=O)S(=O)(=O)[O-].[K+].[K+]
• Inhalation Risk: Evaporation at 20 °C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed.
• Effects of Short Term Exposure: The substance is corrosive to the eyes. The substance is irritating to the skin, respiratory tract and gastrointestinal tract. Exposure could cause asthma-like reactions or urticaria in sensitive persons.
• Effects of Long Term Exposure: Repeated or prolonged inhalation may cause asthma-like symptoms. The substance may have effects on the skin.
• Uses: Potassium Metabisulfite is a chemical preservative and antioxi- dant obtained as white or colorless crystals, powder, or granules. it is soluble in water and insoluble in alcohol. the sulfite salt yields sulfurous acid at a low ph. it is used as a food preservative. As antifermentative in breweries and wineries; bleaching straw; preservative for fruits and vegetables. Potassium Metabisulfite (2:1) is used as a chemical preservative.