Index Item

Super Grade

A Grade

Total amount of Alkali(counted by Na2CO3 dry-basis percentage) % >=

99.2

98.8

Total amount of Alkali(counted by Na2CO3 wet-basis percentage) % >=

97.9

97.5

NaCl (counted by NaCl dry-basis percentage) %<=

0.70

0.90

Fe%(by its dry-basis) <=

0.0035

0.006

Water insoluble % <=

0.03

0.1