Item

Superior class

First class

Qualified class

Purity,%

≥99.2

≥99.0

≥99.0

Chloride(based on Cl),%

≤0.02

≤0.03

≤0.03

Chlorate(based on Cl),%

≤0.02

≤0.03

≤0.03

Hypochlorite

None

None

None

Water insolubles,%

≤0.02

≤0.03

≤0.04

Moisture,%

≤0.02

≤0.03

≤0.04

Residues(150um),%

≤0.1

≤0.5

≤1.0

PH

7±1.5

7±1.5

7±1.5

Sodium(based on NaClO₄),%

≤0.20

None

None

Bromate(based on KBrO₃),%

≤0.02

None

None

Calcium magnesium salt(based on oxide),%

≤0.20

None

None