Potassium disulfite

• Catalog No.: 12619
• CAS Number: 16731-55-8
• M. F.: K2O5S2
• M. W.: 222.3236
• Purity: 95.0-101.0% (iodometric)

SYNONYMS

• Title: 焦亚硫酸钾
• IUPAC name: dipotassium sulfinatosulfonate
• IUPAC Traditional name: dipotassium metabisulfite
• Synonyms: 偏硫代硫酸钾; Potassium pyrosulfite; Potassium metabisulfite; 偏重亚硫酸钾

DATABASE IDS

• PubChem SID: 24847706
• CAS Number: 16731-55-8
• MDL Number: MFCD00167605
• EC Number: 240-795-3

PROPERTIES

• Antion Traces: chloride (Cl-): ≤100 mg/kg
• Cation Traces: As: ≤2 mg/kg
• Cation Traces: Cu: ≤20 mg/kg
• Cation Traces: Fe: ≤10 mg/kg
• Cation Traces: Hg: ≤1 mg/kg
• Cation Traces: Pb: ≤2 mg/kg
• Cation Traces: Se: ≤5 mg/kg
• Cation Traces: Zn: ≤20 mg/kg
• Grade: puriss.
• Impurities: organic volatile impurities, complies (GC)
• Impurities: residual solvents, in accordance
• Impurities: ≤0.001% heavy metals (as Pb)
• Impurities: ≤0.08% thiosulfate (S2O3)
• Impurities: 51.8-57.6% sulfur dioxide
• Linear Formula: K2S2O5
• Purity: 95.0-101.0% (iodometric)
• Quality: meets analytical specification of Ph.Eur., BP, NF, FCC, E224
• Suitability: in accordance for appearance of solution
• Apperance: powder
• pH: 3.5-4.5 (20 °C, 5%)
• GHS Signal Word: Warning
• GHS Hazard statements: H315-H319-H335
• European Hazard Symbols: Irritant (Xi)
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves
• GHS Precautionary statements: P261-P305 + P351 + P338
• Risk Statements: 31-36/37/38
• RTECS: TT4920000
• Safety Statements: 26-36
• German water hazard class: 1