trisodium hydrogen diphosphate
- CAS NO.：14691-80-6
- Empirical Formula: H5NaO7P2
- Molecular Weight: 201.97
- EINECS: 238-735-6
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-05-27 22:57:22
What is trisodium hydrogen diphosphate ?
Description
Trisodium hydrogen diphosphate is a moisture retaining agent, which is one of the five new varieties of food additives reviewed and approved by the Ministry of Health. It is a member of the pyrophosphate family with the best water retention properties, and due to its neutral pH, it is more soluble than basic pyrophosphates.
Chemical properties
Trisodium hydrogen diphosphate is a white powder crystal, easily soluble in water, the aqueous solution is close to neutral and insoluble in ethanol. It often exists in the form of monohydrate (Na3HP2O7·H2O), and the crystal water is not easy to remove. When heated to above 170℃, it can be slowly decomposed into disodium dihydrogen pyrophosphate and sodium pyrophosphate; above 240℃, it can be decomposed into metaphosphate.
The Uses of trisodium hydrogen diphosphate
Trisodium hydrogen diphosphate is an inorganic phosphate that can be used as a food additive (moisture retention agent, emulsifier, flavor enhancer).
Flammability and Explosibility
Non flammable
Properties of trisodium hydrogen diphosphate
| vapor pressure | 0Pa at 20℃ |
| Water Solubility | 293g/L at 20℃ |
| CAS DataBase Reference | 14691-80-6 |
| EPA Substance Registry System | Diphosphoric acid, trisodium salt (14691-80-6) |
Safety information for trisodium hydrogen diphosphate
Computed Descriptors for trisodium hydrogen diphosphate
trisodium hydrogen diphosphate manufacturer
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