Sodium Hydrosulfite
Specifications
1.Name:Sodium Hydrosulfite
2.Formula:Na2S2O4
3.Appearance: white crystalline powder
4.Bouquet: no odor
2.Formula:Na2S2O4
3.Appearance: white crystalline powder
4.Bouquet: no odor
Technical specification:
|
Specification
|
90%
|
88%
|
85%
|
Food grade
|
|
Na2S2O4
|
≥90%
|
≥88%
|
≥85%
|
≥85%
|
|
Fe
|
≤20ppm
|
≤20ppm
|
≤20ppm
|
≤20ppm
|
|
Zn
|
≤1ppm
|
≤1 ppm
|
≤1ppm
|
≤1ppm
|
|
Solution Appearance
|
Clear
|
Clear
|
Clear
|
Clear
|
|
Other heavy metal (as pb)
|
—
|
—
|
—
|
—
|
|
HCHO
|
—
|
—
|
—
|
≤0. 05%
|
|
Water insoluble matter
|
≤0.05%
|
≤0.05%
|
≤0.05%
|
—
|
|
Reserve period (months)
|
12
|
12
|
12
|
12
|
Sodium hydrosulfite(sodium hydrosulphite) can be used as a reducing agent for vat dyes,disperse dyes can be used to restore the clean,reactive dyes can be used for stripping color,silk,hair bleach,food bleaching agent,the depositary agent,antioxidant agents,preservation agents,bleaching of paper,industrial bleaching agent,processing,reducing agent,sulfonating agent.
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