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| Product Name: | Metaphosphoric acid | | Synonyms: | METAPHOSPHORIC ACID, CHIP, REAGENTPLUS, 99.99%;META-PHOSPHORIC ACID ~65%, PIECES;METAPHOSPHORIC ACID, ACS REAGENT;METAPHOSPHORIC ACID, EXTRA PURE ( SOLID);Meta-PhosphoricAcidGr(GlacialSticks);M-PhosphoricAcidGr;Metaphosphoricacid,ACS;Metaphosphoric acid, stabilized | | CAS: | 37267-86-0 | | MF: | HO3P | | MW: | 79.98 | | EINECS: | 253-433-4 | | Product Categories: | UVCBs-inorganic | | Mol File: | 37267-86-0.mol |  |
| | Metaphosphoric acid Chemical Properties |
| Melting point | 21°C | | Boiling point | 158°C | | density | 2 g/cm3 | | vapor pressure | 0.04 hPa at 20 °C | | storage temp. | Store below +30°C. | | solubility | Soluble in alcohol. | | form | pieces | | color | Glassy | | Odor | Odorless | | Water Solubility | Decomposes in water. Soluble in alcohol. | | Sensitive | Hygroscopic | | Merck | 14,7345 | | Stability: | Stable. Incompatible with strong bases, most metals. | | CAS DataBase Reference | 37267-86-0(CAS DataBase Reference) | | EPA Substance Registry System | Metaphosphoric acid (37267-86-0) |
| Hazard Codes | C | | Risk Statements | 34-35-22-37 | | Safety Statements | 26-36/37/39-45 | | RIDADR | UN 3260 8/PG 3 | | WGK Germany | 3 | | F | 3 | | TSCA | Yes | | HazardClass | 8 | | PackingGroup | III | | HS Code | 28092019 |
| | Metaphosphoric acid Usage And Synthesis |
| Physical Properties | Glass-like colorless solid; soft and transparent; deliquesces; sublimes at red heat; dissolves slowly in cold water, decomposing to phosphoric acid; soluble in alcohol.
| | Preparation | Metaphosphoric acid is obtained as a polymeric glassy solid by prolonged heating of phosphoric acid. Either phosphoric acid, H3PO4, or pyrophosphoric acid, H4P2O7, when heated above 300°C, on cooling yields the transparent glassy mass of composition (HPO3)n.
Metaphosphoric acid also is obtained from partial hydration of phosphorus pentoxide by dissolving it in cold water.
| | Uses | An inorganic reagent used for research purposes | | Uses | In dentistry for making zinc oxyphosphate cement; as reagent in chemical analysis. | | Uses | Metaphosphoric acid is used as a dehydrating agent. Its derivative, sodium hexametaphosphate is used as a sequestrant and a food additive. It is also used as phosphorylating agent, analytical reagent and in dental cements. | | Definition | ChEBI: Phosphonate(1-) is a monovalent inorganic anion obtained by deprotonation of one of the two OH groups in phosphonic acid. It is a phosphorus oxoanion and a monovalent inorganic anion. It is a conjugate base of a phosphonic acid. It is a conjugate acid of a phosphonate(2-). | | General Description | meta-Phosphoric acid is a monobasic acid. |
| | Metaphosphoric acid Preparation Products And Raw materials |
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