18102 Sigma-Aldrich

Benzoic acid

meets analytical specification of Ph. Eur., BP, USP, FCC, E210, 99.5-100.5% (alkalimetric)

  • CAS Number 65-85-0

  • Linear Formula C6H5COOH

  • Molecular Weight 122.12

  •  Beilstein Registry Number 636131

  •  EC Number 200-618-2

  •  MDL number MFCD00002398

  •  PubChem Substance ID 57647710



Related Categories Acids, Acids & Bases, Benzoic Acid and Benzoic Acid Solutions, Chemical Synthesis, Essential Chemicals,
grade   meets analytical specification of Ph. Eur., BP, USP, FCC, E210
vapor density   4.21 (vs air)
vapor pressure   10 mmHg ( 132 °C)
assay   99.5-100.5% (alkalimetric)
form   crystalline
autoignition temp.   1061 °F
quality   meets analytical specification of Ph. Eur., BP, USP, FCC, E210
impurities   oxidisable substances, complies
  residual solvents, complies
  ≤0.0005% heavy metals (as Pb)
  ≤0.03% halogen compounds (as Cl)
  ≤0.7% water (Karl Fischer)
ign. residue   ≤0.05% (as SO4)
loss   ≤0.5% loss on drying, 3 h (via H2SO4)
pH   3-5 (20 °C, 0.1%)
bp   249 °C(lit.)
mp   121-125 °C(lit.)
solubility   water: soluble (2.9 g/l at 25 °C)
cation traces   As: ≤3 mg/kg
  Cu: ≤10 mg/kg
  Hg: ≤1 mg/kg
  Pb: ≤2 mg/kg
  Zn: ≤20 mg/kg
suitability   complies for appearance of solution
  complies for reaction against H2SO4



Benzoic acid may be employed as a standard in the quantitative and calorimetric studies. It may be employed as an intermediate in the synthesis of the following:
• paints
• pigments
• varnish
• wetting agents
• aroma compounds
• benzoyl chloride
• benzotrichloride
It was used to investigate the mechanism of complex addition reaction of hydroxyl radicals with various aromatic compounds.

General description

Benzoic acid is an aromatic monocarboxylic acid. It occurs in the form of colorless leaflets or needles. It reacts with hydrogenating reagents to afford hexahydrobenzoic acid. On decomposition (by heating) in the presence of lime or alkali, it affords benzene and carbon dioxide. It can be synthesized by the cobalt or manganese catalyzed atmospheric oxidation of toluene.

Price and Availability

Suggested Laboratory Gloves

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Cross-Coupling Guide
Safety & Documentation

Safety Information

Signal word 
Hazard statements 
Precautionary statements 
Target organs 
Personal Protective Equipment 
WGK Germany 
Flash Point(F) 
249.8 °F
Flash Point(C) 
121 °C
Protocols & Articles


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