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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
                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
                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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