Phosphoric Acid, Fosforus Acid, Ortho Phosphoric Acid, Polyphosphoric Acid, Acid Phosphoric, E338, 7664-38-2

Phosphoric Acid, Fosforus Acid, Ortho Phosphoric Acid, Polyphosphoric Acid, Acid Phosphoric, E338, 7664-38-2

Chemical Identity

• Molecular Formula: H₃PO₄

• Molecular Weight: 97.994 g/mol

• Chemical Name: Orthophosphoric Acid

• CAS Number: 7664-38-2

• Other Names: Orthophosphoric Acid, Trihydroxidooxidophosphorus, O-Phosphoric Acid, Polyphosphoric Acid, Acid Phosphoric

Physical Properties

• Colorless, odorless, crystalline liquid or solid.

• Pure phosphoric acid melts at 42.35 °C.

• Density: 1.834 g/cm³.

• Commercially available in 75% and 85% solutions.

• Corrosive to metals and tissues.

• Fully miscible with water.

• Non-flammable, stable under normal conditions.

Chemical Properties

• First prepared in 1694 by dissolving phosphorus pentoxide in water.

• One of the most important compounds of phosphorus.

• Tribasic acid: can donate three protons.

• Acts as a sequestration agent, binding divalent cations such as Fe²⁺, Cu²⁺, Ca²⁺, and Mg²⁺.

• Used in the production of phosphate salts.

Applications

• Food industry: acidity regulator, flavor enhancer.

• Pharmaceuticals: phosphate salts, buffer solutions.

• Agriculture: source of phosphorus in fertilizers.

• Industrial uses: metal cleaning, rust removal.

Packaging and Delivery

• Prayon 85% IBC: 1,700 kg

• China 85% Original Drum: 35 kg

• China 85% IBC (included): 1,650 kg

• China 85% IBC (returnable): 1,650 kg

• 85% Tanker Delivery: Çorlu, Gebze, Bursa regions (including transport)