Polyphosphoric acid , About 84 , 8017-16-1
Synonym(s):
Polyphosphoric acid;PPA
CAS NO.：8017-16-1
Empirical Formula: (H)n+2.(P)n.(O)3n+1
Molecular Weight:
MDL number: MFCD00084480
EINECS: 232-417-0
PRODUCT Properties
| Melting point: | -20°C |
| Boiling point: | 550 °C |
| Density | 2.06 g/mL at 25 °C |
| vapor pressure | 2 hPa (20 °C) |
| storage temp. | Store below +30°C. |
| solubility | Methanol (Soluble), Water (Soluble) |
| pka | 0.91[at 20 ℃] |
| form | Viscous Liquid |
| color | Colorless |
| Specific Gravity | 2.06 |
| Water Solubility | MAY DECOMPOSE |
| Sensitive | Hygroscopic |
| Merck | 14,7580 |
| Stability: | Stable. Incompatible with strong bases. Hygroscopic. |
Description and Uses
Superphosphoric acid is made by the concentration of regular wet-process acid up to P2O5 concentrations of 78%. Granular polyphosphates suitable for bulk blending are made by reacting ammonia with regular wet process acid of 52% P2O5 content and using the heat of reaction to drive off water to produce a phosphate melt of 10-43-0, with about 40% of the phosphorus in the polyphosphate form. These materials are, however, not suitable for bulk blending due to their “sticky” nature (10).
Polyphosphoric Acid is a ligand used as an analytical tool to image nanoparticles through photon emission topography. Used also in the synthesis of pharmaceuticals.
Safety
| Symbol(GHS) |  GHS05 |
| Signal word | Danger |
| Hazard statements | H290-H314 |
| Precautionary statements | P234-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338-P363 |
| Hazard Codes | C |
| Risk Statements | 34 |
| Safety Statements | 45-36/37/39-25-26 |
| RIDADR | 3264 |
| WGK Germany | 1 |
| TSCA | Yes |
| HazardClass | 8 |
| PackingGroup | III |
| HS Code | 28092000 |
