| Chemistry name: | metaphosphoric acid; phosphoric acid, glacial |
| M Formula: | (HPO3)x |
| Properties: | |
| Transparent, highly deliquescent, glassy mass. D 2.2–2.488. Soluble in water slowly forming the ortho-acid. Also soluble in alcohol. Noncombustible. | |
| Derivation: | |
| By heating orthophosphoric acid to redness, by treating phosphorus pentoxide with a calculated quantity of water; by heating diammonium phosphate. | |
| Grade: | |
| Technical, CP. | |
| Use: | |
| Phosphorylating agent, dehydrating agent, dental cements, laboratory reagent. | |