Assay (K4P2O7) calc. on the ignited basis, not less than................. 95,0 %

Arsenic (as As), not more than........................................................ 3 ppm

Insoluble substances in water, not more than.................................. 0,1 %

Loss on ignition, not more than........................................................ 0,5 %

P2O5 content...........................................................................42,0-43,7 %

pH of 1%.................................................................................... 10,0-10,7

Fluoride, not more than................................................................. 10 ppm

Lead, not more than........................................................................ 2 ppm

Mercury, not more than................................................................... 1 ppm

Cadmium, not more than................................................................ 1 ppm