79622-M

Phosphoric acid

puriss. p.a., crystallized, ≥99.0% (T)

• Synonym(s): Orthophosphoric acid
• Linear Formula: H₃PO₄
• CAS Number: 7664-38-2
• Molecular Weight: 98.00
• Beilstein/REAXYS Number: 1921286
• EC Number: 231-633-2
• MDL number: MFCD00011340
• UNSPSC Code: 12352106
• PubChem Substance ID: 329768533
• NACRES: NA.21

Properties

• vapor density: 3.4 (vs air)
• Quality Level: 200
• vapor pressure: 2.2 mmHg ( 20 °C); 5 mmHg ( 25 °C)
• grade: puriss. p.a.
• assay: ≥99.0% (T)
• form: crystalline
• quality: crystallized
• impurities: ≤0.002% KMnO₄-reducing matter (as O)
• bp: 158 °C (lit.)
• mp: ~40 °C (lit.); ~40 °C
• solubility: water: 850 g/L at 20 °C
• density: 1.685 g/mL at 25 °C (lit.)
• anion traces: chloride (Cl^-): ≤5 mg/kg; nitrate (NO₃^-): ≤5 mg/kg; phosphite, hypophosphite (as H₃PO₃): ≤500 mg/kg; sulfate (SO₄^2-): ≤30 mg/kg
• cation traces: As: ≤1 mg/kg; Ca: ≤10 mg/kg; Cd: ≤1 mg/kg; Co: ≤1 mg/kg; Cr: ≤1 mg/kg; Cu: ≤1 mg/kg; Fe: ≤10 mg/kg; K: ≤5 mg/kg; Mg: ≤1 mg/kg; Mn: ≤1 mg/kg; Na: ≤50 mg/kg; Ni: ≤1 mg/kg; Pb: ≤1 mg/kg; Zn: ≤1 mg/kg
• SMILES string: OP(O)(O)=O
• InChI: 1S/H3O4P/c1-5(2,3)4/h(H3,1,2,3,4)
• InChI key: NBIIXXVUZAFLBC-UHFFFAOYSA-N

Description

General description

The product is crystalline phosphoric acid.

Application

Phosphoric acid has been employed as an oxidation reagent in a study.1 It may be used in the preparation of ammonium phosphate.

Other Notes

Concentrated phosphoric acid is approx. 85% H₃PO₄ (aqueous).

Caution

product may become solid, becomes liquid on heating to 50°C

Safety Information

• pictograms: GHS05,GHS07
• signalword: Danger
• hcodes: H290 - H302 - H314
• pcodes: P234 - P280 - P301 + P312 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Hazard Classifications: Acute Tox. 4 Oral - Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1B
• Storage Class: 8A - Combustible, corrosive hazardous materials
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable