Name of index

Index

Actual index

K₂HPO₄                                           %

≥98

99.1

Substances not dissolved in water   %

≤0.20

0.02

As                                                     %

≤0.0003

<0.0003

Heavy metal (Pb)                             %

≤0.002

<0.002

Fluorides (F)                                    %

≤0.001

<0.001

Burning  loss                                    %

≤2.0

0.4