Key Properties of Disodium Phosphate
| Product Name: | Disodium Phosphate |
| Synonyms: | Sodium Hydrogen Phosphate, DSP |
| CAS No: | 7558-79-4 |
| Chemical Formula: | Na₂HPO₄ |
| Grade: | IP / BP / USP |
| Appearance: | White, crystalline powder or granules |
| Molar Mass: | 141.96 g/mol |
| Solubility: | Freely soluble in water, insoluble in alcohol |
| Melting Point: | Na₂HPO₄ (anhydrous) decomposes upon heating |
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Manufacturing process of Disodium Phosphate
Step 1: Raw Material Selection
- High-purity phosphoric acid and sodium carbonate are selected.
- Raw materials undergo strict quality checks for purity.
Step 2: Chemical Reaction & Processing
- Phosphoric acid reacts with sodium carbonate to form Disodium Phosphate solution.
- The solution is filtered and refined to remove impurities.
Step 3: Crystallization & Drying
- The solution is evaporated, crystallized, and dried to achieve the required purity.
Step 4: Quality Control & Testing
- The product is tested for assay, solubility, moisture content, and pH as per IP/BP/USP standards.
Step 5: Packaging & Storage
- Packed in HDPE bags or fiber drums to prevent contamination.
- Stored in a cool, dry place to maintain stability.
Applications of Disodium Phosphate
Technical Specifications of Disodium Phosphate
| Sr. No. | Test | Specification |
|---|---|---|
| 1 | Description | White, crystalline powder or granules |
| 2 | Assay (Purity) | Not less than 98.0% |
| 3 | Loss on Drying | Not more than 0.5% |
| 4 | pH (5% solution) | 8.0 – 9.5 |
| 5 | Solubility | Freely soluble in water |
| 6 | Chloride (Cl⁻) | Not more than 50 ppm |
| 7 | Sulphate (SO₄²⁻) | Not more than 150 ppm |
| 8 | Heavy Metals | Not more than 10 ppm |
| 9 | Iron (Fe) | Not more than 5 ppm |
| 10 | Lead (Pb) | Not more than 3 ppm |
| 11 | Arsenic (As) | Not more than 2 ppm |
| 12 | Residue on Ignition | Not more than 0.05% |
Packing and Storage condition of Disodium Phosphate
Packing:
Packed in 25 kg / 50 kg HDPE bags with an inner LDPE liner for moisture protection.
Bulk packaging available upon request.
Storage:
Store in a cool, dry, and well-ventilated area, away from direct sunlight and incompatible substances.
Why Choose Chemignition for
Disodium Phosphate Supply?
Quality Assurance
Grade Compliance
Disodium Phosphate is manufactured in adherence to stringent global pharmaceutical standards.
In-House Quality Control
Each batch undergoes rigorous testing for purity, stability, and efficacy.
Regulatory Approvals
Certified for export and compliant with international regulatory requirements.
Large-Scale Manufacturing and Export
Grade Compliance
Disodium Phosphate is manufactured in adherence to stringent global pharmaceutical standards.
In-House Quality Control
Each batch undergoes rigorous testing for purity, stability, and efficacy.
Regulatory Approvals
Certified for export and compliant with international regulatory requirements.
