Product: Sodium Sulfite
CAS NO: 7757-83-7
Molecular formula: Na2SO3
Properties:
White crystal or powder.
Application:
Used in Dyeing and printing Industry, as dechlorinating agent and bleaching agent, in leather and tanning industry as bleaching agent, reductant agent, stabilizer agent, or used in papermaking, electronic and water treatment industry. In food industry as additive used for preservative, antioxidant, antimicrobic and bacteriostatic. Also, used in the photographic industry and pharmaceutical industry.
Specification:
|
Items
|
Industry grade
|
Food grade
|
|
Content(Na2SO3) (%)
|
96.0 min.
|
98.0 min.
|
|
Sodium Sulfate(SO4) (%)
|
2.5 max..
|
1.5 max.
|
|
Chloride(NaCl) (%)
|
0.5 max.
|
0.1 max.
|
|
Arsenic(As) (%)
|
-
|
0.0002 max.
|
|
Heavy metals(as Pb) (%)
|
-
|
0.0005 max.
|
|
Iron(Fe) (%)
|
0.005 max.
|
0.002 max.
|
|
Water insoluble (%)
|
0.05 max.
|
0.02 max.
|
|
Items
|
Pharmaceutical grade
|
Photo grade
|
|
Content(Na2SO3) (%)
|
98.0 min.
|
98.0 min.
|
|
Sodium Sulfate(SO4) (%)
|
1.5 max.
|
1.5 max.
|
|
Chloride(Cl) (%)
|
0.05 max.
|
0.05 max.
|
|
Arsenic(As) (%)
|
0.0002 max.
|
0.0002 max.
|
|
Heavy metals(as Pb) (%)
|
0.0005 max.
|
0.0002 max.
|
|
Iron(Fe) (%)
|
0.001 max.
|
0.0005 max.
|
|
Selenium (Se ) (%)
|
0.0001 max.
|
0.0005 max.
|
|
Zinc (Zn) (%)
|
0.0001 max.
|
0.0001 max.
|
|
Copper(Cu) (%)
|
0.0001 max.
|
0.00001 max.
|
|
Mercurg(Hg) (%)
|
0.0001 max.
|
0.00001 max.
|
|
