Metaphosphoric acid

CAS No.：37267-86-0

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This product is a chemical product/pharmaceutical intermediate. It is not a drug, an active pharmaceutical ingredient (API), or a pharmaceutical-grade material. It has not been granted a drug approval number or a Chemical Drug Substance Approval Notice, has not passed drug-related review and approval, and is not manufactured, tested, or released in accordance with pharmaceutical GMP.
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Metaphosphoric acid Basic information

Physical Properties Preparation

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)

Safety Information

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

MSDS Information

Provider	Language
ACROS	English
SigmaAldrich	English
ALFA	English

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.
General Description	meta-Phosphoric acid is a monobasic acid.

Metaphosphoric acid Preparation Products And Raw materials

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