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18102

Sigma-Aldrich

Benzoic acid

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

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Synonym(s):
Benzenecarboxylic acid, Carboxybenzene
Linear Formula:
C6H5COOH
CAS Number:
65-85-0
Molecular Weight:
122.12
Beilstein:
636131
EC Number:
200-618-2
MDL number:
MFCD00002398
PubChem Substance ID:
57647710

vapor density

4.21 (vs air)

Quality Level

200

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

SMILES string

OC(=O)c1ccccc1

InChI

1S/C7H6O2/c8-7(9)6-4-2-1-3-5-6/h1-5H,(H,8,9)

InChI key

WPYMKLBDIGXBTP-UHFFFAOYSA-N

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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.

Application

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.

Pictograms

CorrosionHealth hazard
GHS05,GHS08

Signal Word

Danger

Hazard Statements

H315 - H318 - H372

Hazard Classifications

Eye Dam. 1 - Skin Irrit. 2 - STOT RE 1 Inhalation

Target Organs

Lungs

Storage Class Code

6.1C - Combustible, acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

WGK

WGK 1

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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