37267-86-0

Basic information

• 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 NO: 37267-86-0
• Molecular Formula: HO3P
• Molecular Weight: 79.98
• EINECS: 253-433-4
• Product Categories: UVCBs-inorganic
• Mol File: 37267-86-0.mol
• Article Data: 0

Chemical Properties

• Melting Point: 21°C
• Boiling Point: 158°C
• Appearance: Glassy/pieces
• Density: 2,2 g/cm3
• Vapor Pressure: 0.04 hPa at 20 °C
• Storage Temp.: Store below +30°C.
• Solubility: Soluble in alcohol.
• Water Solubility: Decomposes in water. Soluble in alcohol.
• Sensitive: Hygroscopic
• Stability: Stable. Incompatible with strong bases, most metals.
• Merck: 14,7345
• CAS DataBase Reference: Metaphosphoric acid(CAS DataBase Reference)
• NIST Chemistry Reference: Metaphosphoric acid(37267-86-0)
• EPA Substance Registry System: Metaphosphoric acid(37267-86-0)

Safety Data

• Hazard Codes: C
• 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
• Hazardous Substances Data: 37267-86-0(Hazardous Substances Data)

Usage

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

Different sources of media describe the Uses of 37267-86-0 differently. You can refer to the following data:
1. An inorganic reagent used for research purposes
2. In dentistry for making zinc oxyphosphate cement; as reagent in chemical analysis.
3. 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.

General Description

meta-Phosphoric acid is a monobasic acid.

InChI:InChI=1/C8H16O4.H3O4P/c1-5-9-6(2)11-8(4)12-7(3)10-5;1-5(2,3)4/h5-8H,1-4H3;(H3,1,2,3,4)