Disodium Phosphate (CAS: 7558-79-4) – Food Additive and Industrial Chemical

🧪 CAS Number: 7558-79-4

🌟 Product Description

Disodium phosphate is a white crystalline inorganic salt obtained by partial neutralization of phosphoric acid. It is highly water-soluble and available in anhydrous, dihydrate, and monohydrate forms. Widely used as a food additive (E339), buffering agent in water treatment, and in various industrial applications.

🏭 Applications

🍞 Food Industry: Emulsifier, stabilizer, and pH regulator (E339)

💧 Water Treatment: Buffering agent, corrosion inhibitor

🧪 Chemicals & Laboratory: Preparation of buffer solutions, reagent

🧼 Detergents & Cleaning: Complexing agent

📄 Paper & Textile: Processing aid

📊 Physical & Chemical Properties

Appearance: White crystalline powder or granules

Odor: Odorless

Molecular Formula: Na₂HPO₄

Molecular Weight: 141.96 g/mol (anhydrous form)

Density: ~2.36 g/cm³

Melting Point: ~250 °C (anhydrous form)

Solubility: Freely soluble in water

⚠️ Storage & Safety

Store in a cool, dry place, protected from moisture. May cause skin and eye irritation; wear appropriate PPE during handling.

🔑 Keywords

disodium phosphate, CAS 7558-79-4, E339, food additive, buffer solution, water treatment chemical

📛 Other Names

Dibasic Sodium Phosphate, Na₂HPO₄