Item

Drinking Water Grade

(White Powder)

Industry Grade

(Yellow Powder)

Standard

GB15892-2009

GB22627-2008

Al₂O₃

29% Min

28% Min

Alkalinity

40-90%

30-95%

Water insoluble

0.6% Max

1.5% Max

PH (1% water solution)

3.5-5.0

3.5-5.0

Fe

-

5.0% Max

As

0.0002% Max

0.0015 Max

Pb

0.001% Max

0.006 Max

Cd

0.0002% Max

-

Hg

0.00001% Max

-

Cr+6

0.0005% Max

-