1. Product Identification
Product Name: Dipotassium Phosphate Trihydrate
Chemical Formula: K₂HPO₄·3H₂O
Molecular Weight: 228.22 g/mol
EINECS Number: 231-834-5 (same as anhydrous form)
Synonyms: DKP, DKP Trihydrate, Potassium hydrogen phosphate trihydrate
2. Physical and Chemical Properties
Appearance: White crystalline powder
Odor: Odorless
Solubility: Freely soluble in water, insoluble in alcohol
pH (1% solution): 8.8 – 9.4
Melting Point: Loses water of crystallization before melting
Stability: Stable under normal storage conditions
3. Specifications
| Parameter | Unit | Industrial Grade | Food Grade |
|---|
| Assay (as K₂HPO₄·3H₂O) | % | ≥ 98.0 | ≥ 98.0 |
| pH (1% solution) | - | 8.8 – 9.4 | 8.8 – 9.2 |
| Water Insoluble Matter | % | ≤ 0.2 | ≤ 0.1 |
| Heavy Metals (as Pb) | % | ≤ 0.001 | ≤ 0.0005 |
| Arsenic (As) | % | ≤ 0.0003 | ≤ 0.0001 |
| Fluoride (F) | % | ≤ 0.005 | ≤ 0.003 |
| Loss on Drying | % | 15.0 – 17.0 | 15.0 – 17.0 |
4. Applications
Industrial Grade:
（1）Used in metal surface treatment, electroplating, and buffering solutions
（2）Common in detergents, water softening, and ceramic processing
（3）Serves as a flame retardant additive in certain formulations
Food Grade:
（1）Acts as a pH buffer, emulsifier, and stabilizer
（2）Widely used in processed cheese, instant beverages, creamers, and bakery products
（3）Approved as food additive (E340(ii)) in many countries
5. Packaging and Storage
（1）Packaging:
25 kg or 50 lb polyethylene-lined kraft paper bags
Bulk bags or customized packaging available upon request
（2）Storage Conditions:
Store in a cool, dry, well-ventilated area
Keep container tightly closed to avoid moisture absorption
Avoid exposure to high humidity and direct sunlight
（3）Shelf Life:
24 months if properly stored in original packaging
6. Safety and Handling
Not classified as hazardous under normal usage
Avoid inhalation of dust and contact with eyes
Use appropriate PPE: gloves, goggles, and dust mask when handling in bulk
Follow local regulations and consult the Safety Data Sheet (SDS) for detailed handling instructions
7. Regulatory Information
Compliant with:
a.FCC (Food Chemicals Codex) for food grade
b.EU Regulation (E340(ii))
c.Codex Alimentarius
d.ISO/USP standards depending on the application and grade
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