Sodium Metabisulphite,Sodium Sulphite,Barium Nitrate,Ammonium Bicarbonate,Calcium Sodium Nitrate,Sodium Nitrite-Shouguang Boyu Chemical Co.,Ltd

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Sodium Sulfite Anhydrous

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
Item	Industry Grade	Food Grade
Purity ( As Na₂SO₃)	96.0% min	98.0% min
Sodium sulphate ( SO₄)	2.5% max	1.5% 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
Item	Photo Grade	Pharmaceutical Grade
Purity ( As Na₂SO₃)	98.0% min	98.0% min
Sodium sulphate ( SO₄ )	1.5% max	1.5% 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

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