60508

Potassium disulfite

BioUltra, ≥97.0% (RT)

• Synonym(s): Potassium metabisulfite, Potassium pyrosulfite
• Linear Formula: K₂S₂O₅
• CAS Number: 16731-55-8
• Molecular Weight: 222.32
• NACRES: NA.25
• PubChem Substance ID: 57651772
• UNSPSC Code: 12352302
• EC Number: 240-795-3
• MDL number: MFCD00167605
• Assay: ≥97.0% (RT)
• Grade: reagent grade
• Solubility: H₂O: 0.1 M at 20 °C, clear, colorless

Properties

• grade: reagent grade
• Quality Segment: 100
• product line: BioUltra
• assay: ≥97.0% (RT)
• impurities: insoluble matter, passes filter test
• pH: 2.5-4.5 (25 °C, 0.1 M in H₂O)
• solubility: H₂O: 0.1 M at 20 °C, clear, colorless
• anion traces: chloride (Cl^-): ≤50 mg/kg
• 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
• absorption: cut-off at 308 nm in H₂O at 0.1 M
• SMILES string: [K+].[K+].[O-]S(=O)S([O-])(=O)=O
• 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

Description

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.

Safety Information

• pictograms: GHS05
• signalword: Danger
• supp_hazards: EUH031
• Storage Class: 11 - Combustible Solids
• wgk: WGK 1
• ppe: dust mask type N95 (US), Eyeshields, Gloves
• hcodes: H315,H318
• pcodes: P264 - P280 - P302 + P352 - P305 + P351 + P338 - P332 + P313 - P362 + P364
• Hazard Classifications: Eye Dam. 1 - Skin Irrit. 2