Project Description
Disodium Phosphate
Synonyms: Sodium hydrogen phosphate; Sodium phosphate dibasic; Disodium hydrogen phosphate; Disodium hydrogen phosphate; DSP
Molecular Formula:
Disodium Phosphate Anhydrous: Na2HPO4;
Disodium Phosphate Dihydrate: Na2HPO4·2H2O;
Disodium Phosphate Heptahydrate: Na2HPO4·7H2O;
Disodium Phosphate Dodecahydrate: Na2HPO4·12H2O
Molecular Weight:
Disodium Phosphate Anhydrous: 141.96;
Disodium Phosphate Dihydrate: 177.96;
Disodium Phosphate Heptahydrate: 268.07;
Disodium Phosphate Dodecahydrate: 358.0
CAS No:
Disodium Phosphate Anhydrous: 7758-79-4;
Disodium Phosphate Dihydrate: 10028-24-7;
Disodium Phosphate Heptahydrate: 7782-85-6;
Disodium Phosphate Dodecahydrate: 10039-32-4
INS: E339(ii)
Einecs: 231-448-7
Properties: Disodium phosphate dodecahydrate is a white or colorless crystalline free-flowing solid, weathered in air and water soluble in alcohol. Disodium phosphate anhydrous is a white powder.
Disodium Phosphate Anhydrous (Na2HPO4) Specification:
| Index | DSP Anhy (Food Grade) |
|---|---|
| Main contents (Na2HPO4) | 98.0%min. |
| P2O5 | 49.0-51.0% |
| PH of 1% water solution | 8.4-9.6 |
| Chloride,as Cl | 0.05%max. |
| Sulfate, as SO4 | 0.06%max. |
| Heavy metals, as Pb | 0.001%max. |
| Arsenic, as As | 0.0001%max. |
| Fluoride, as F | 0.001%max. |
| Water insoluble matter | 0.05%max. |
| Loss on drying | 5.0%max. |
Disodium Phosphate Dihydrate (Na2HPO4·2H2O) Specification:
| Item | DSP 2H2O (Food Grade) |
|---|---|
| Content | 98.0%min. |
| P2O5 (Dry basis) | 49.0-51.0% |
| PH | 8.4-9.6 |
| As | 0.0001%max. |
| Pb | 0.0001%max. |
| F | 0.001%max. |
| Cd | 0.0001%max. |
| Hg | 0.0001%max. |
| Insoluble in water | 0.2%max. |
| Loss on drying | 22.0%max. |
Disodium Phosphate Heptahydrate (Na2HPO4·7H2O) Specification:
| Item | DSP 7H2O (Tech Grade) |
|---|---|
| Content (Dry basis) | 99% min. |
| Insoluble matter in water | 0.2% max. |
| PH | 8.6-9.4 |
| As | 0.0003% max. |
| Heavy metals (as Pb) | 0.001% max. |
| Pb | 0.0004% max. |
| F | 0.005% max. |
| Loss on drying | 50.0% max. |
Disodium Phosphate Dodecahydrate (Na2HPO4·12H2O) Specification:
| Item | DSP 12H2O (Food Grade) | DSP 12H2O (Analytical Pure) |
|---|---|---|
| Main content | 98.0%min. | 99.0%min. |
| P2O5 (Dry basis) | 49.0-51.0% | 49.0-51.0% |
| PH of 1% water solution | 8.8-9.2 | 9.1-9.4 |
| Chloride, as Cl | 0.02%max. | 0.001%max. |
| Sulfate, as SO4 | 0.25%max. | 0.005%max. |
| Heavy metals, as Pb | 0.001%max. | 0.0005%max. |
| Arsenic, as As | 0.0001%max. | 0.0005%max. |
| Insoluble matter in water | 0.1%max. | 0.005%max. |
Application:
Disodium phosphate, also known as sodium phosphate dibasic, has several applications in various industries:
1. Food industry: Disodium phosphate is used as a food additive, primarily as a pH regulator, emulsifier, and stabilizer. It is found in processed food products like cheese, bakery, canned goods, and beverages. It helps improve texture, enhance shelf life, and prevent the formation of crystals or lumps.
2. Pharmaceutical industry: Disodium phosphate is used in pharmaceutical formulations as a buffering agent to control the pH of solutions or suspensions. It is also used as a laxative when combined with monosodium phosphate.
3. Water treatment: Disodium phosphate is used in water treatment processes, particularly as a boiler water conditioning agent and a corrosion inhibitor. It helps prevent scale buildup and reduces the potential for corrosion in industrial boilers and cooling systems.
4. Detergent industry: Disodium phosphate is utilized in detergent formulations as a surfactant and a builder. It enhances cleaning efficiency by helping to remove dirt, oil, and stains from various surfaces.
5. Cosmetics and personal care products: Disodium phosphate can be found in some cosmetic and personal care products, such as shampoos, toothpaste, and mouthwashes. It functions as a pH adjuster, stabilizer, and emulsifier in these products.
6. Laboratory and research: Disodium phosphate is commonly used in laboratory settings as a buffering agent for preparing various solutions and in specific experiment protocols.
For more food applications, please visit 3 Questions Lead to a Better Understanding of Disodium Phosphate in Food
Packing： In PP+PE bags of 25kgs net each, we can provide packages according to the customer’s requirement.
Storage： Store at a cool, dry, and well-ventilated place.
Shelf life：24 months.
Support: Dibasic Sodium Phosphate – Material Safety Data Sheet (MSDS).
