Disodium Hydrogen Phosphate Dihydrate CAS 10028-24-7
Disodium hydrogen phosphate dihydrate (also known as DSP), with CAS number 10028-24-7, has the chemical formula Na₂HPO₄·2H₂O and a molecular weight of 177.99. It is a common inorganic phosphate salt and a weakly basic salt.
Appearance: White crystals or powder, odorless
Density: 1.064 g/mL (at 20℃)
Melting point: 92.5℃ (loses water)
Solubility: Easily soluble in water (93 g/L at 20℃), insoluble in ethanol
pH: 9.0–9.4 (50 g/L aqueous solution, weakly alkaline)
Stability: Stable at room temperature; loses 2 molecules of crystalline water at 180℃ to form an anhydrous form; hygroscopic
| Item | Specification |
| CAS | 10028-24-7 |
| Chemical Name | Disodium Hydrogen Phosphate DihydrateIsolongifolene |
| pH | 9.0–9.4 |
1. Food Industry
Emulsifiers (cheese, condensed milk, protein coagulation prevention)
Acidity regulators, stabilizers, chelating agents (beverages, baking, meat products)
2. Pharmaceuticals
Eye drops pH buffers (such as PBS buffer)
Pharmaceutical excipients, chelating agents, laxatives
3. Industry / Water Treatment
Disodium hydrogen phosphate dihydrate is used in boiler softeners, anti-scaling agents, dyeing stabilizers, flame retardants
4. Cosmetics / Beauty Products
Disodium hydrogen phosphate dihydrate is used in toothpaste, pH regulators, stabilizers in beauty products
• Standard Packing: 25 kg/bag; 25 kg/drum
• MOQ: to be confirmed by grade and destination
• Lead Time: to be confirmed by order quantity and production schedule
• Shipping: sea / air / express options available
• Store in a cool, dry, and well-ventilated place.
• Keep container tightly closed and protected from moisture.
• Avoid direct sunlight, heat, and open flame.
• Follow SDS guidance for incompatible materials.
