No.	Specifications	Industrial Grade	Food Grade
1	Total phosphate, as P2O5%	68.0	68.0
2	Inactive phosphate, as P2O5%	7.5	7.5
3	Iron, as Fe %	0.05	0.05
4	Ph value (1% solution) %	5.8-7.3	5.8-6.5
5	Solubility	Qualified	Qualified
6	Heavy metals, as Pb  %		0.001
7	Arsenic, as As%		0.0003
8	Fluoride as F%		0.003
9	Water insoluble %	0.05	0.06