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Property: white gravel or powder crystal,relative density is 1.561, less to dissolve in water and its water solution has alkaline reaction; it is hard to dissolve in ethanol. It is used to produce chloroform,solasulfone and Benzaldehyde in medical industry.
Molecular Formula : Na2SO3
Molecule Weight : 126.04
CAS NO .: 7757-83-7
Appearance : White Free Flowing Fine Crystal or Powder
Specification for Industry Grade and Food Grade :
Item |
Quality Index
|
|
Industry Grade
|
Food Grade
|
|
Purity ( As Na2SO3) |
96.0% min
|
98.0% min
|
Sodium sulphate ( SO4) |
2.0% max
|
1.0% max
|
Chlorides ( As 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 insolubles |
0.05% max
|
0.02% max
|
Specification For Photo Grade and Pharmaceutical Grade
Item |
Quality Index
|
|
Photo Grade
|
Pharmaceutical Grade
|
|
Purity ( As Na2SO3) |
98.0% min
|
98.0% min
|
Sodium sulphate ( SO4 ) |
1.0% max
|
1.0% max
|
Chlorides ( As CL-) |
0.05% max
|
0.05% max
|
Arsenic ( As ) |
0.0002% max
|
2ppm max
|
Lead ( As Pb) |
0.0005% max
|
2ppm max
|
Iron (Fe) |
0.001% max
|
5ppm max
|
Selenium ( Se) |
0.0001% max
|
1ppm max
|
Zinc ( Zn) |
0.0001% max
|
1ppm max
|
Copper ( Cu ) |
0.0001% max
|
0.1ppm max
|
Mercury ( Hg) |
0.0001% max
|
0.1 ppm max
|
Application :
(1) Industry Grade : Used in Dyeing and printing Industry ,as dechlorinating agent and bleaching agent, in leather and tanning industry as bleaching agent , developer agent , reductant agent , stabilizer agent , or used in papermaking, electronic and water treatment industry.
(2) Food Grade: In food industry as additive (E223) preservative, antioxidant and antimicrobic for fruits (dried, glazed and candled), vegetables (onions, potatoes, etc.), juices (citrus and grapes) and fish (shrimps and prawns). In silage treatment as antifermentative. In starch and sweeteners production as bacteriostatic.
(3) Photo Grade: In the photographic industry as component of developer bath .
(4) Pharmaceutical Grade : pharmaceutical industry for the production of chloroform, benzene and formaldehyde phenylpropanoid Sulfone
Packing: Packed in 25kg plastic woven bag, Kraft paper bag, PE bag, 500kg/1000kg/1100kg/1200kg jumbo bag or as per the buyer’s requirement
Storage: Store the product in a dry and cool place.
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