Potassium disulfite
SIGMA/60508 - BioUltra, ≥97.0% (RT)
Synonym: Potassium metabisulfite; Potassium pyrosulfite
CAS Number: 16731-55-8
Empirical Formula (Hill Notation): K2O5S2
Molecular Weight: 222.32
EC Number: 240-795-3
MDL Number: MFCD00167605
Linear Formula: K2S2O5
Product Type: Chemical
absorption | cut-off at 308 nm in H2O at 0.1 M |
anion traces | chloride (Cl-): ≤50 mg/kg |
assay | ≥97.0% (RT) |
cation traces | Al: ≤5 mg/kg |
As: ≤0.1 mg/kg | |
Ba: ≤5 mg/kg | |
Bi: ≤5 mg/kg | |
Ca: ≤10 mg/kg | |
Cd: ≤5 mg/kg | |
Co: ≤5 mg/kg | |
Cr: ≤5 mg/kg | |
Cu: ≤5 mg/kg | |
Fe: ≤5 mg/kg | |
Li: ≤5 mg/kg | |
Mg: ≤5 mg/kg | |
Mn: ≤5 mg/kg | |
Mo: ≤5 mg/kg | |
Na: ≤1000 mg/kg | |
Ni: ≤5 mg/kg | |
Pb: ≤5 mg/kg | |
Sr: ≤5 mg/kg | |
Zn: ≤5 mg/kg | |
impurities | insoluble matter, passes filter test |
InChI | 1S/2K.H2O5S2/c;;1-6(2)7(3 |
InChI key | RWPGFSMJFRPDDP-UHFFFAOYSA |
pH | 2.5-4.5 (25 °C, 0.1 M in H2O) |
product line | BioUltra |
Quality Level | 100 |
SMILES string | [K+].[K+].[O-]S(=O)S([O-] |
solubility | H2O: 0.1 M at 20 °C, clear, colorless |
Application: | Potassium disulfite (Potassium metabisulfite) may be use to study is antioxidant effects and ability to preserve food. Potassium disulfite may be used as an inhibitor of yeasts, bacteria, and fungi growth. Potassium metabisulfite may be used to study its potential toxicities in vivo. |
Symbol | GHS05,GHS07 |
Signal word | Danger |
Hazard statements | H318 - H335 |
Precautionary statements | P280 - P305 + P351 + P338 + P310 |
Hazard Codes | Xi |
Risk Statements | 31-41 |
Safety Statements | 26-39 |
RIDADR | NONH for all modes of transport |
WGK Germany | WGK 1 |
Supplemental Hazard Statements | EUH031 |
Purity | ≥97.0% (RT) |
UNSPSC | 12352302 |