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Inorganic Salts

Sodium Metabisulphite IP

RA003888 CAS 7681-57-4 IP

Identity

Product code
RA003888
CAS number
7681-57-4
Grade
IP
Purity
95%
Molecular formula
Na2S2O5
Molecular weight
190.10

Classification

Technical Data

Specifications

ParameterSpecificationUnit
Description Colourless, prismatic crystals or a white or creamy white powder —
Identification 'A' Solution should give reaction (A) of sodium salts —
Identification 'B' The solution should be colorless and should give reaction of sulphates —
pH 3.5 - 5.0 —
Arsenic Max 4 ppm ppm
Iron Max 40 ppm ppm
Thiosulphate Not more than a faint opalescence should produced —

6 grades of this substance are listed. Each grade is a separate product with its own specifications, pack sizes and documents.

Packaging

Pack size SKU
25 kg RA003888-PK-25KG
1 kg RA003888-PK-1KG
5 kg RA003888-PK-5KG