239275

meta-Phosphoric acid

ACS reagent, chips, 33.5-36.5%

• Synonym(s): Metaphosphoric acid
• Linear Formula: (HPO₃)_n
• CAS Number: 37267-86-0
• MDL number: MFCD00011351
• UNSPSC Code: 12352106
• PubChem Substance ID: 329752524
• NACRES: NA.21

Properties

• grade: ACS reagent
• form: chips
• contains: 57.0-63.0% sodium phosphite as stabilizer
• concentration: 33.5-36.5%
• density: 2 g/cm³
• anion traces: MnO₄^- reducers: ≤0.02%; chloride (Cl^-): ≤0.001%; nitrate (NO₃^-): ≤0.001%; sulfate (SO₄^2-): ≤0.005%
• cation traces: As: ≤1 ppm; Fe: ≤0.005%; heavy metals: ≤0.005% (by ICP)
• SMILES string: OP(=O)=O
• InChI: 1S/HO3P/c1-4(2)3/h(H,1,2,3)
• InChI key: UEZVMMHDMIWARA-UHFFFAOYSA-N

Description

General description

meta-Phosphoric acid is a polymer form of phosphoric acid. It is used as a catalyst as well as a reactant in chemical synthesis.

Application

meta-Phosphoric acid can be used as:      

• A catalyst in combination with InCl₃ to synthesize 1,8-dioxooctahydroxanthene derivatives by the reaction of cyclic β-diketones and aldehydes.      
• A phosphate precursor to synthesize antimony phosphate (SbPO₄) by reacting with antimony metal at high temperatures.

Safety Information

• Pictograms: GHS05
• Signal Word: Danger
• Hazard Statements: H314
• Precautionary Statements: P260 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338 - P363
• Hazard Classifications: Eye Dam. 1 - Skin Corr. 1
• Storage Class Code: 8B - Non-combustible corrosive hazardous materials
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable