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Synonyms: sodium hydrogen phosphate, sodium dibasic phosphate, sodium phosphate dibasic, disodium phosphate, di sodium phosphate, disodium hydrogen phosphate, Sodium phosphate, disodium hydrogen phosphate dodecahydrate, dibasic sodium phosphate dodecahydrate.
Molecular formula: Na2HPO4. 12H2O
Molecular weight: 358.0
CAS Number: 7758-79-4
Properties:
Disodium Phosphate Dodecahydrate is white or colorless crystalline free flowing solid, efflorescent in air, easily soluble in water, but insoluble in alcohol, its water solution is slightly alkaline, relative density at 1.52 g/cm3, melting point at 35℃.
Specifications:
| Specification | Industry grade | Food grade |
| main assay (AsNa 2 HPO 4 ’12H 2 0 ) %e | 97.0 | 98.0 |
| PH value (1% solution ) | 9±0.2 | 9±0.2 |
| Sulfate (As SO 4 ) %d | 0.7 | 0.25 |
| Chloride (As Cl ) %d | 0.05 | 0.03 |
| Water insoluble matter %d | 0.05 | 0.05 |
| Fluoride (As F ) %d | 0.05 | |
| Heavy metal (As Pb ) %d | 0.001 | |
| Arsenic (As As ) %d | 0.005 | |
| Loss on dry (Na 2 HPO 4 ) %d | 5.00 |
Use: As fire-extinguishing agent for fabric, woods, paper; as soft water agent for boiler. For food grade, it is mainly used as food additive and so on.
Packing: Plastic bag, net weight 25kg, in dry and cool place.
