The Karwar Chemical Division of Aditya Birla Chemicals (India) produces technical grade phosphoric acid. Specifications Ortho phosphoric acid, H3PO4, % ww min. 86.0 P2O5, % ww, min 62.3 Specific gravity at 20oC, min 1.700 Iron as Fe, ppm, max. 10.0 Calcium as Ca, ppm, max. 80.0 Magnesium as Mg, ppm, max. 5.0 Heavy metals as Pb, ppm, max. 10.0 Chloride as Cl, ppm, max. 20.0 Fluoride as F, ppm, max. 100.0 Sulphate as SO4, ppm, max. 300.0