| Customization: | Available |
|---|---|
| Powder: | Yes |
| Customized: | Customized |
|
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Top Quality CAS 7757-83-7 anhydrous sodium sulfite with reasonable price
CAS no.: 7757-83-7
MF: Na2SO3
1.Appearance: White Powder
2.Purity: 96%, 97%, 98%
3.PH :7-10 for Normal grade. PH:6-8 for viscose grade.
4.Properties: white fine crystal or powder, easily soluble in water; absorb moisture; odorless, non-toxic.
5.Factory,SGS,Intertek,BV. ISO9001:2008 GB/T 19001-2008
Anhydrous sodium sulfite, white crystal or powder; odorless; easily soluble in water, very slightly soluble in ethanol, almost insoluble in ether. It is soluble in water (12.54g/100ml water at 0°C; 28.3g/100ml water at 80°C), the highest solubility is about 28% at 33.4°C, the aqueous solution is alkaline, and the pH is about 9-9.5. Slightly soluble in alcohol, insoluble in liquid chlorine
COA
|
Item |
Quality Index |
|
|
Industry Grade |
Food Grade |
|
|
Purity ( As Na2SO3) |
96.0% min |
98.0% min |
|
Sodium sulphate ( SO4) |
2.0% max |
1.2% max |
|
Chlorides ( As NaCL) |
0.5% max |
0.08% max |
|
Arsenic ( As ) |
- |
0.0002% max |
|
Heavy metals ( As Pb ) |
- |
0.0005% max |
|
Iron (Fe) |
0.005% max |
0.003% max |
|
Water insoluble |
0.05% max |
0.01% max |
(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 anti-fermentative. 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.
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