| CAS No.: | 7757-83-7 |
|---|---|
| Formula: | Na2so4 |
| EINECS: | 231-821-4 |
| Certification: | CCIC, CIQ, ISO |
| Purity: | 97% |
| Type: | Sodium Sulfite Anhydrous |
| Samples: |
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Audited Supplier Industrial Grade Anhydrous Sodium Sulfite 98% for Bleaching Printing and Dyeing
Product Description
Appearance: White Powde
Purity: % 99min
PH :7-10 for Normal grade. PH:6-8 for viscose grade
Properties: white fine crystal or powder, easily soluble in water; absorb moisture; odorless, non-toxic.
In the field of water treatment, sodium sulfite is used as a deoxidizer for boiler water and oilfield water injection, and as a dechlorination agent for municipal or industrial water. In wastewater treatment, it is used to reduce hexavalent chromium salt to low toxicity trivalent chromium salt, and can precipitate and separate silver from wastewater. At present, sulfite is mostly used in small and medium-sized boilers and boilers operating under pressure less than 5.88MPa, usually with 2% ~ 10% solution. The dosage of sodium sulfite is usually 0. 076g/L. It is best to add appropriate amount of catalyst, such as Cu, Co, Mn, Ni salts, can improve the rate of oxygen removal. When the boiler is out of use, it can be filled with alkaline deoxygenating water which has been deoxygenated and about 200mg/L sodium sulfite to protect the metal from corrosion. In addition, as a deoxidizer for water injection in oil field, as long as lOmg/L sodium sulfite is added, the corrosion of dissolved oxygen on well pipe can be controlled. In addition, sodium sulfite in chemical production as a raw material for the production of sodium thiosulfate, is also the stabilizer of viscose fiber, beer bottle fungicide, glass mirror and SLATE engraving agent, fabric bleaching components and deoxidizer, photosensitive industrial developer, etc.
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ODIUM SULPHITE 97%MIN(ANHYDROUS)
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ITEM
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SPECIFICATION
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TEST RESULT
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NA2SO3 CONTENT
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97 %MIN
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0.976
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IRON (FE)
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0.003%MAX
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0.000017
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SODIUM CHLORIDE (NACL)
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0.1%MAX
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0.0006
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AS
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0.0002%MAX
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0.000001
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HEAVY METALS ( AS PB)
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0.001%MAX
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0.000005
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WATER INSOLUBLE
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0.02%MAX
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0.0001
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Audited Supplier 
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