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Specifications
sodium hydrosulfite 90% 88% 85 %
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Basic information:
Name:sodium hydrosulfite 90% 88% 85 %
Other name:sodium hydrosulphite
MF:Na2S2O4
CAS NO.:7775-14-6
EINECS No.:231-890-0
Appaerance:white crystal powders
No.
Index name
Index
Note
90%specification
88%specification
85%specification
1
Appearance
White crystalline powder
White crystalline powder
White crystalline powder
Eye measurement
2
Hydros content
% ≥
% ≥
90.5
88.5
85.5
Compulsory test
3
Content of
insoluble substance
in water % ≤
insoluble substance
in water % ≤
0.1
0.1
0.2
Spot test
4
Content of
sodium carbonate
%≥
sodium carbonate
%≥
1
1
1
Spot test
5
Granularity
A, B
A, B, C
A, B, C, D
Compulsory test ( Eye measurement )
6
Odor
Gentleness
Gentleness
Gentleness
Compulsory test