Parameter

Index

Industrial Grade

Food Grade

Content

99% min

97-103%

Na2HPO4.5H2O

1.2% max

-

Ca

0.03% max

-

Fe

20ppm max

-

Sulphate

0.1% max

-

PH Value

5.5-8.5

-

As

-

3ppm max

Fluoride

-

10ppm max

Heavy Metals

-

10ppm max