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79617 Sigma-Aldrich

Phosphoric acid

BioUltra, ≥85% (T)

Synonym: Orthophosphoric acid

  • CAS Number 7664-38-2

  • Linear Formula H3PO4

  • Molecular Weight 98.00

  •  Beilstein/REAXYS Number 1921286

  •  EC Number 231-633-2

  •  MDL number MFCD00011340

  •  PubChem Substance ID 57652809

  •  NACRES NA.26

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Properties

vapor density   3.4 (vs air)
vapor pressure   2.2 mmHg ( 20 °C)
  5 mmHg ( 25 °C)
InChI Key   NBIIXXVUZAFLBC-UHFFFAOYSA-N
product line   BioUltra
assay   ≥85% (T)
impurities   insoluble matter, passes filter test
  ≤0.001% KMnO4-reducing matter (as O)
  ≤0.001% volatile acids (as CH3COOH)
refractive index   n20/D 1.433
bp   158 °C (lit.)
mp   ~40 °C (lit.)
solubility   H2O: 1 M at 20 °C, clear, colorless
density   1.685 g/mL at 25 °C (lit.)
anion traces   chloride (Cl-): ≤2 mg/kg
  fluoride (F-): ≤1 mg/kg
  nitrate (NO3-): ≤5 mg/kg
  phosphite, hypophosphite (as H3PO3): ≤50 mg/kg
  sulfate (SO42-): ≤30 mg/kg
cation traces   Ag: ≤1 mg/kg
  Al: ≤1 mg/kg
  As: ≤0.5 mg/kg
  Ba: ≤1 mg/kg
  Bi: ≤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
  Li: ≤1 mg/kg
  Mg: ≤1 mg/kg
  Mn: ≤1 mg/kg
  Mo: ≤1 mg/kg
  Na: ≤20 mg/kg
  Ni: ≤1 mg/kg
  Pb: ≤1 mg/kg
  Sb: ≤2 mg/kg
  Sr: ≤1 mg/kg
  Tl: ≤1 mg/kg
  Zn: ≤1 mg/kg
λ   1 M in H2O
UV absorption   λ: 260 nm Amax: ≤0.05
  λ: 280 nm Amax: ≤0.04
Gene Information   human ... SRC(6714)

Description

Application

Phosphoric acid has been used in the preparation of anolyte, a constituent of the capillary isoelectric focusing (CIEF) solutions. It has also been used as a chemical oxidation reagent in flow injection analysis-chemical oxidation-isotope ratio mass spectrometry (FIA-CO-IRMS).

Other Notes

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

Caution

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

Safety & Documentation

Safety Information

Symbol 
GHS05  GHS05
Signal word 
Danger
Hazard statements 
Precautionary statements 
RIDADR 
UN 1805 8 / PGIII
WGK Germany 
1
Protocols & Articles
Peer-Reviewed Papers
15

References

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