| Identification | More | [Name]
Metaphosphoric acid | [CAS]
37267-86-0 | [Synonyms]
METAPHOSPHORIC ACID
M-PHOSPHORIC ACID
PHOSPHORIC ACID, META
VITREOUS SODIUM ACID METAPHOSPHATE
metaphosphoric
METAPHOSPHORIC ACID CHIP A.C.S. REAGE&
META-PHOSPHORIC ACID 33.5-36.5%, ACS, ST AB.
METAPHOSPHORIC ACID SIGMAULTRA
METAPHOSPHORIC ACID, CHIP, A.C.S. REAGEN T
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
PHOSPHORICACID,META,CHIP,REAGENT,ACS
Phosphoric Acid, Meta, Chip, Reagent
Formaldehyde,1.0 mg/mL in Water | [EINECS(EC#)]
253-433-4 | [Molecular Formula]
HO3P | [MDL Number]
MFCD00011351 | [Molecular Weight]
79.98 | [MOL File]
37267-86-0.mol |
| Chemical Properties | Back Directory | [Appearance]
transparent glass-like solid | [Melting point ]
21°C | [Boiling point ]
158°C | [bulk density]
1000kg/m3 | [density ]
2,2 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 | [PH]
2 (20°C, 33g/L in H2O) | [Stability:]
Stable. Incompatible with strong bases, most metals. | [Water Solubility ]
Decomposes in water. Soluble in alcohol. | [Sensitive ]
Hygroscopic | [Merck ]
14,7345 | [CAS DataBase Reference]
37267-86-0(CAS DataBase Reference) | [EPA Substance Registry System]
Metaphosphoric acid (37267-86-0) |
| Safety Data | Back Directory | [Hazard Codes ]
C | [Risk Statements ]
R34:Causes burns. | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) . | [RIDADR ]
UN 3260 8/PG 3
| [WGK Germany ]
3
| [F ]
3 | [TSCA ]
Yes | [HazardClass ]
8 | [PackingGroup ]
III | [HS Code ]
28092019 |
| Questions And Answer | Back Directory | [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.
|
| Hazard Information | Back Directory | [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. |
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