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Potassium disulfite

SIGALD/12619 - puriss., meets analytical specification of Ph.Eur., BP, NF, FCC, E224, 95.0-101.0% (iodometric), powder, 51.8-57.6% sulfur dioxide

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
Catalog Number PKG Qty. Price Quantity
45-12619-1KG 1 kg
 $79.10
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anion traces chloride (Cl-): ≤100 mg/kg
assay 95.0-101.0% (iodometric)
cation traces As: ≤2 mg/kg
  Cu: ≤20 mg/kg
  Fe: ≤10 mg/kg
  Hg: ≤1 mg/kg
  Pb: ≤2 mg/kg
  Se: ≤5 mg/kg
  Zn: ≤20 mg/kg
form powder
grade puriss.
impurities organic volatile impurities, complies (GC)
  residual solvents, in accordance
  ≤0.001% heavy metals (as Pb)
  ≤0.08% thiosulfate (S2O3)
  51.8-57.6% sulfur dioxide
InChI 1S/2K.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5)/q2*+1;/p-2
InChI key RWPGFSMJFRPDDP-UHFFFAOYSA-L
pH 3.5-4.5 (20 °C, 5%)
quality meets analytical specification of Ph.Eur., BP, NF, FCC, E224
Quality Level 100 
SMILES string [K+].[K+].[O-]S(=O)S([O-])(=O)=O
suitability in accordance for appearance of solution
Purity 95.0-101.0% (iodometric)
UNSPSC 12352302

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