ITEM

SPECIFICATION

TEST RESULT

Na2SO3 content  :

97.0 %min

97.65%

Sodium sulphate :

2.5%max

1.72%

Sodium chloride (NaCL):

0.10%max

0.05%

Iron (Fe) :

0.005%max

0.002%

Water insoluble  :

0.02%max

0.02%

Free alkali (as Na2CO3)  :

0.10%max

0.04%

Heavy metals (as Pb) :

0.005%max

0.001%

Arsenic (As) :

0.0002%max

0.0002%