Cas number 16731-55-8 MDL number: MFCD00167605
Beilstein EINECS: 240-795-3
Molecular formula K2S2O5
Molecular weight 222.32
Potassium pyrosulfite
White crystalline powder. There is sulfur dioxide smell. Sensitive to moisture. There is an acid reaction. Sulfur dioxide escapes in contact with acid. It gradually oxidizes to sulfate in the air, and oxidizes faster in the humid air. If it is ground into powder, it can burn. Soluble in water, insoluble in alcohol. Decomposes at 190 ℃. Irritating.
Density: 2.34 Item analysis pure chemical purity
(AR) (CP)
Content (K2S2O5) Assay,% ≥ 95.094.0
Clarity test Insoluble matter in water,% ≤ 0.005 0.02
Chloride (Cl),% ≤ 0.005 0.01
Iron (Fe) Iron,% ≤ 0.00050.002
Arsenic (As),% ≤ 0.00010.0003
Heavy metals (calculated as Pb) Heavy metals,% ≤ 0.001 0.002 sealed and stored in a cool place.
Product use reducing agent, developer, bacterial inhibitor, antioxidant, preparation of sulfurous acid.
Work Protective Clothing,Isolation Protective Clothing,First Protective Clothing,Sterile Disposable Clothing
ShenZhen Bri-Cloud Industrial Co.,Ltd , https://www.sobeautyhealth.com