SODIUM SULPHITE ANHYDROUS Extra Pure
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Chemical Specifications
Appearance
White crystalline powder
Assay (iodometric)
95 - 100.5%
SO2
Min 48%
Identity
Passes test
Appearance of solution
Passes test
Thiosulphate (S2O3)
Max 0.04%
Arsenic (As)
Max 0.0002%
Heavy metal (as Pb)
Max 0.001%
Iron (Fe)
Max 0.001%
Copper (Cu)
Max 0.0005%
Selenium (Se)
Max 0.001%
Zinc (Zn)
Max 0.0025%