Index Item

I category

II category

III category

Super

A Grade

A Grade

Qualified

A Grade

Qualified

Na2SO4%  ≥

99.3

99

98

97

95

92

Water Insoluble %   ≤

0.05

0.1

0.2

-

-

-

Ca,Mg( Mg)%  ≤

0.1

0.15

0.3

0.4

0.6

-

Chloride (Cl)%≤

0.12

0.35

0.7

0.9

2

-

Fe  %  ≤

0.002

0.002

0.01

0.04

-

-

Moisture %  ≤

0.1

0.2

0.5

1

1.5

-

Whiteness % ≥

85

82

82

-

-

-