Technical Grade
Food Grade

Total phosphate, as P2O5
68.0% min.
68.0% min.

Inactive phosphate, as P2O5
7.5% max.
7.5% max.

Iron, as Fe
0.05% max.
0.05% max.

pH of 1% water solution
5.8-7.3
5.8-6.5

Solubility
Qualified
Qualified

Heavy metal, as Pb
-
0.001% max.

Arsenic, as As
-
0.0003% max.

Fluoride, as F
-
0.003% max.

Water insoluble
0.05% max.
0.06% max.