Sodium metabisulphite Food grade FinSQ 25KG Go Back

CASR

: 7681-57-4

Molecular Formula

: Na2S2O5

Molecular Weight

: 190.1
Specifications  
Description: White crystals or crystalline powder having an odour of sulfur dioxide.
Solubility: Freely soluble in water; slightly soluble in ethanol.
Test for sodium: Passes test
Test for sulfite: Passes test
Water insolubles: The solution should be clear with only a trace of suspended matter.
pH: 4.0 - 4.5 (1 in 10 soln)
Thiosulphate(S2O3): NMT 0.1%
Iron(Fe): NMT 10 mg/kg
Lead(Pb): NMT 2 mg/kg
Selenium (Se): NMT 5 mg/kg
Assay: NLT 90.0%
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