Product Details

Product Description

molecular formula: Na₂SO₃

CAS: 7757-83-7

Appearance:

Colorless crystal or powder

Properties:

Clarify degrees test colorless, single inclined crystals or powder. For the eyes, skin and mucous membrane is irritant, can pollute the water. By the high produce poisonous sulfide decomposition smoke.

Use:

Industrial mainly used in making sulfite cellulose esters, glucosinolate and sodium, organic chemicals, bleached fabrics etc, also used as reductant, preservative, to chlorine agent.

Details:

Test item	Specification
Test item	Reagent grade	Pharmaceutical grade
Appearance	Conform	Conform
Assay /%	≥97.0	≥95.0
Clarify degrees test	Conform	Conform
Water insoluble /%	≤0.005	≤0.01
Acidic sulphite (NaHSO₃)	Conform	Conform
Free alkali (Na₂CO₃)/%	≤0.1	≤0.3
Chloride (Cl)/%	≤0.005	≤0.02
Glucosinolate and sulphate (S₂O₃)/%	≤0.01	≤0.02
Arsenic (As) /%	≤0.0001	≤0.0005
Ferric (Fe)/%	≤0.0005	≤0.002
Heavy metal (Pb)/%	≤0.001	≤0.002

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