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Metaphosphoric acid

CAS No.
37267-86-0
Chemical Name:
Metaphosphoric acid
Synonyms
metaphosphoric;M-PHOSPHORIC ACID;Metaphosphoricaci;M-PhosphoricAcidGr;METAPHOSPHORIC ACID;PHOSPHORIC ACID, META;stabilized with NaPO3;Metaphosphoricacid,ACS;meta-PHOSPHORIC ACID AR;M-PHOSPHORIC ACID STICKS
CBNumber:
CB2853567
Molecular Formula:
HO3P
Lewis structure
hpo3 lewis structure
Molecular Weight:
79.98
MDL Number:
MFCD00011351
MOL File:
37267-86-0.mol
MSDS File:
SDS
TDS File:
TDS
Last updated:2026-05-28 00:50:22

Metaphosphoric acid Properties

Melting point 21°C
Boiling point 158°C
Density 2 g/cm3
bulk density 1000kg/m3
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)
Water Solubility Decomposes in water. Soluble in alcohol.
Sensitive Hygroscopic
Merck 14,7345
Stability Stable. Incompatible with strong bases, most metals.
Cosmetics Ingredients Functions CHELATING
BUFFERING
Cosmetic Ingredient Review (CIR) Metaphosphoric acid (37267-86-0)
InChI 1S/HO3P/c1-4(2)3/h(H,1,2,3)
InChIKey UEZVMMHDMIWARA-UHFFFAOYSA-N
SMILES OP(=O)=O
CAS DataBase Reference 37267-86-0(CAS DataBase Reference)
EWG's Food Scores 1
FDA UNII MTK99R3UV0
EPA Substance Registry System Metaphosphoric acid (37267-86-0)
UNSPSC Code 12352301
NACRES NA.21

SAFETY

Risk and Safety Statements

Symbol(GHS)  Corrosion (GHS05)
GHS05
Signal word  Danger
Hazard statements  H314
Precautionary statements  P260-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338-P363
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
3
TSCA  TSCA listed
HazardClass  8
PackingGroup  III
HS Code  28092019
Storage Class 8A - Combustible corrosive hazardous materials
Hazard Classifications Eye Dam. 1
Skin Corr. 1B
NFPA 704
0
3 1

Metaphosphoric acid price More Price(51)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 239275 meta-Phosphoric acid ACS reagent, chips, 33.5-36.5% 37267-86-0 5g $66.4 2026-04-30 Buy
Sigma-Aldrich 239275 meta-Phosphoric acid ACS reagent, chips, 33.5-36.5% 37267-86-0 2.5kg $2390 2026-04-30 Buy
Sigma-Aldrich 1.00546 meta-Phosphoric acid pieces for analysis (stabilized with sodium metaphosphate) EMSURE? 37267-86-0 100g $222 2026-04-30 Buy
Sigma-Aldrich 1.00546 meta-Phosphoric acid pieces for analysis (stabilized with sodium metaphosphate) EMSURE? 37267-86-0 500g $522 2026-04-30 Buy
honeywell 239275 meta-Phosphoric acid 37267-86-0 100g|PlasticBottle $194.68 2026-06-04 Buy
Product number Packaging Price Buy
239275 5g $66.4 Buy
239275 2.5kg $2390 Buy
1.00546 100g $222 Buy
1.00546 500g $522 Buy
239275 100g|PlasticBottle $194.68 Buy

Metaphosphoric acid Chemical Properties, Uses, Production

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

Raw materials

Preparation Products

Global Suppliers ( 218)
Supplier Tel Email Country ProdList Advantage
J & K SCIENTIFIC LTD. 18210857532 18210857532 jkinfo@jkchemical.com China 94607 76
Meryer (Shanghai) Chemical Technology Co., Ltd. 4006356688 18621169109 market03@meryer.com China 40202 62
Alfa Aesar 400-6106006 saleschina@alfa-asia.com China 30103 84
Energy Chemical 400-0056266 sales8178@energy-chemical.com China 44850 61
Shandong Xiya Chemical Co., Ltd 13355009207 13355009207 3007715519@qq.com China 18722 57
Sichuan Kulinan Technology Co., Ltd 400-1166-196 18981987031 cdhxsj@163.com China 11674 57
Tianjin heowns Biochemical Technology Co., Ltd. 400 638 7771 sales@heowns.com China 14412 57
Sinopharm Chemical Reagent Co,Ltd. 86-21-63210123 sj_scrc@sinopharm.com China 9791 79
Maya High Purity Chemicals +86 (573) 82222445 (0)18006601000 452520369 sales@maya-r.com China 11693 57
Spectrum Chemical Manufacturing Corp. 021-021-021-67601398-809-809-809 15221380277 marketing_china@spectrumchemical.com China 9643 60

View Latest Price from Metaphosphoric acid manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
Metaphosphoric acid pictures 2019-07-12 Metaphosphoric acid
37267-86-0
$1.00 1KG 99% 25kg Career Henan Chemical Co
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 Phosphoric Acid, Meta, Chip, Reagent Formaldehyde,1.0 mg/mL in Water meta-Phosphoric acid,Metaphosphoric acid Metaphosphoric acid, stabilized 100GR Metaphosphoric acid, stabilized 500GR PHOSPHORICACID,META,CHIP,REAGENT,ACS Metaphosphoric acid, ACS, 33.5-36.5%, bal. NaPO{3} (Stablizer) Metaphosphoric acid, 39-43%, bal. NaPO{3} (Stabilizer) meta-Phosphoric acid ACS reagent, chips, 33.5-36.5% meta-Phosphoric acid puriss. p.a., ACS reagent, >=33.5% (T) meta-Phosphoric acid Vetec(TM) reagent grade KARL FISCHER REAGENT TITRANT 2 E METAPHOSPHORIC ACID LUMPS Metaphosphoric acid, 39-43 wt. %, balance NaPO3 stabilizer Metaphosphoric acid, 33.5-36.5 wt. %, balance NaPO3 stabilizer, ACS Phosphoric Acid, Meta, Meta METAPHOSPHORIC ACID VITREOUS SODIUM ACID METAPHOSPHATE PHOSPHORIC ACID, META M-PHOSPHORIC ACID 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, Lump Metaphosphoricaci Metaphosphoric acid ISO 9001:2015 REACH m-Phosphoric acid, glacial stick Metaphosphoric Acid, Extra Pure, SLR, Fisher Chemical&trade meta-PHOSPHORIC ACID AR meta-PHOSPHORIC ACID For Synthesis Metaphosphoric acid 40-50% stabilized with NaPO3 M-PHOSPHORIC ACID STICKS metaphosphoric acid p2o5:35% 37267-86-0 HPO3335365balNaPO3Stablizer HO3P HPO3n Analytical Reagents Analytical Chromatography Product Catalog Inorganic Acids Puriss p.a. ACS Synthetic Reagents General Use UVCBs-inorganic