ITEM
 

SPECIFICATION

TEST RESULT

Na2SO3 content
 

98.0 %min

98.30%

Sodium sulphate

1.5%max

1.0%

Sodium chloride (NaCL)
 

0.1%max

0.08%

Iron (Fe)

0.003%max

0.0015%

Water insoluble

0.05%max

0.02%

Heavy metal as Pb

10PPM MAX

5PPM

Free alkali (as Na2CO3)

0.30%max

0.24%