| Chemical Name: | Disodium hydrogen phosphate |
| CAS Number: | 7558-79-4 (anhydrous), 10028-24-7 (heptahydrate), 7782-85-6 (dodecahydrate) |
| EINECS: | 231-448-7 |
| Molecular Formula: | Na₂HPO₄ |
Description
Disodium Hydrogen Phosphate is a versatile sodium salt of phosphoric acid with excellent buffering properties and water solubility. This white, crystalline compound serves as an effective emulsifier, pH regulator, and nutrient source across food, pharmaceutical, and industrial applications.
| Parameter | Specification | Test Method |
|---|---|---|
| Appearance | White crystalline powder | Visual |
| Assay (Na₂HPO₄) | ≥99.0% | Titration |
| pH (1% solution) | 8.0-9.0 | pH meter |
| Water Insoluble | ≤0.05% | Gravimetric |
| Heavy Metals (as Pb) | ≤10 mg/kg | AAS |
| Loss on Drying | ≤0.5% (anhydrous) | Gravimetric |
| Fluoride (as F) | ≤10 mg/kg | Ion chromatography |
● Emulsifier in processed cheese and dairy products
● pH regulator in food processing
● Nutrient supplement in food fortification
● Buffer agent in beverage production
● Water treatment for corrosion control
● Metal surface treatment
● Textile processing auxiliary
● Detergent builder component
● Pharmaceutical preparations
● Laboratory reagent
● Buffer solution preparation
● Food packaging material production
● Anhydrous (Na₂HPO₄)
● Heptahydrate (Na₂HPO₄·7H₂O)
● Dodecahydrate (Na₂HPO₄·12H₂O)
● 25 kg bags with moisture-proof lining
● 500 kg jumbo bags
● Custom packaging available
● Store in dry, ventilated areas
● Keep containers tightly sealed
● Protect from moisture
● Avoid contact with acidic materials
