Specification:

Fine Grade

First Grade

Qualified Grade

Purity

99.7pct.min

99.4pct.min

99.0pct. min

Moisture

0.10pct.max

0.10pct.max

0.30pct.max.

Chloride content(as Cl) 

0.01pct.max

0.02pct.max

0.02pct.max

Insoluble matter in water

0.01pct.max.

0.02pct.max

0.05pct.max.

-Sulfate content(as SO₄  )

0.05pct.max.

0.01pct.max.

-Moisture absorption

0.25pct.max

0.30pct.max.

-Iron  

0.003pct.max.