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SODIUM DITHIONITE

GENERAL

CAS No. 7775-14-6
Chemical Formula Na2 O4 S2
Molecular Weight 174.10

Parameters Specification

APPEARANCE

White to Gray-White crystalline powder

Assay

85% or 88% or 90% min

INSOLUBLES IN WATER

0.1% max 

Na2S2O3

1.2% max

Na2S2O5  5-7% 
NaHSO3  0.5% max
Na2CO3  0.6-2%
HCOONa 0.5% max 
Zn 0.0001% max
Pb 0.0001% max
Fe 0.005% max

 


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