Sodium metaphosphate
- CAS NO.：10361-03-2
- Empirical Formula: NaO3P
- Molecular Weight: 101.96
- MDL number: MFCD00011490
- EINECS: 233-782-9
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-05-20 15:44:38
What is Sodium metaphosphate?
The Uses of Sodium metaphosphate
sodium metaphosphate can be used to adjust pH levels, thus acting as a buffer.
The Uses of Sodium metaphosphate
In dentifrices, polishing agents, abrasive detergents.
Definition
The value of n ranges from 3 to 10 (cyclic molecules) or may be a much larger number (polymers). Cyclic sodium metaphosphate, based on rings of alter- nating phosphorus and oxygen atoms, range from the trimetaphosphate (Na PO 3 ) 3 to at least the decametaphosphate. So-called sodium hexam- etaphosphate is probably a polymer where n is between 10 and 20 (“Calgon”).
Safety Profile
Moderately toxic by intraperitoneal route. When heated to decomposition it emits toxic fumes of NazO and POx. See also PHOSPHATES.
Properties of Sodium metaphosphate
| Melting point: | 600 °C |
| Density | 2.181 |
| storage temp. | Store at +5°C to +30°C. |
| solubility | 1000g/l |
| PH | 5.7 (10g/l, H2O, 20℃) |
| CAS DataBase Reference | 10361-03-2(CAS DataBase Reference) |
| EPA Substance Registry System | Metaphosphoric acid (HPO3), sodium salt (10361-03-2) |
Safety information for Sodium metaphosphate
Computed Descriptors for Sodium metaphosphate
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