Sodium sulfite

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Sodium sulfite
Posting date : Aug 03, 2012
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28-
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Anhydrous sodium sulfite is the main product of our factory with annual production capacity of 100,000 tons. It is white crystalline powder, well soluble inw water and slightly soluble in alcohol. Easily oxidized by the oxygen in the air. It is also reductant. Avoid contact with acid in storage. Anhydyous sodium sulphite English name Anhydyous sodium sulphite Molecular formula Na2SO3 Molecular weight 126.04 Properties White crystalline powder, specific gravity 2.633, soluble in water, slightly soluble in alcohol, aqueous solution was slightly alkaline, thermal decomposition, reductive. Use Mainly used in printing and dyeing, pharmaceutical, papermaking, chemical fiber, photography, food and other industries. Technical specifications High purity grade Refined grade Photographic grade Industrial grade Industrial grade Industrial grade Sodium sulfite Sodium sulfite Sodium sulfite High-class product High-class product First grade product Na2SO3 ≥ % 98 98 97 98 97 96 Fe ≤ % 0.0005 0.002 0.005 0.003 0.003 0.005 Water insoluble ≤ % 0.005 0.01 0.05 0.02 0.02 0.03 Free alkali ≤ % 0.1 0.3 0.15 0.1 0.1 0.4 Sodium sulfate ≤ % 1.5 1.5 — 1.5 2.5 — Sodium chloride ≤ % 0.005 0.02 — 0.01 0.1 — Heavy metal on Pb≤ % 0.001 0.002 0.002 — — — As ≤ % 0.0001 0.0005 — — — — Sodium thiosulfate ≤% 0.01 0.02 0.03 — — — Aqueous solution appearance Qualified Qualified Qualified — — — Reaction of silver nitrate ammonia solution — — Qualified — — —

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