Phosphoric Acid 85% Tech Grade & Food Grade Formula:H3PO4 85% 81% 75% CAS: 7664 38 2 Usage as food acidulant yeast untr Phosphoric Acid 85% Molecular formula ... superphosphates, other phosphate salts, polyphosphates, detergents. Acid catalyst in making ethylene, purifying hydrogen peroxide. ... and flavor, synergistic antioxidant and sequestrant in food. In dental cements; rustproofing of metals before ...