Anhydrous sodium sulfite

• Post Date:

  Aug 01,2013

• Expiry Date:

  Jan 28,2014

• Detailed Description:

  Cas No. :7757-83-7 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	—	—	—