Acetic acid 80 % puriss. p.a. (C2H4O2)

Acetic acid

IUPAC name

Acetic acid

Systematic name

Ethanoic acid

Other names

Methanecarboxylic acid^[4][5]

Identifiers

Abbreviations

AcOH

CAS number

64-19-7 

PubChem

176

ChemSpider

171 

UNII

Q40Q9N063P 

EC number

200-580-7

UN number

2789

DrugBank

DB03166

MeSH

Acetic+acid

ChEBI

CHEBI:15366 

ChEMBL

CHEMBL539 

IUPHAR ligand

1058

RTECS number

AF1225000

ATC code

G01AD02,S02AA10

Beilstein Reference

506007

Gmelin Reference

1380

3DMet

B00009

Properties

Molecular formula

C₂H₄O₂

Molar mass

60.05 g mol⁻¹

Appearance

Colourless liquid

Odor

vinegar-like

Density

1.049 g cm^-3

Melting point

16 to 17 °C; 61 to 62 °F; 289 to 290 K

Boiling point

118 to 119 °C; 244 to 246 °F; 391 to 392 K

Solubility in water

Miscible

log P

-0.322

Acidity (pK_a)

4.76

Basicity (pK_b)

9.198

Refractive index (n_D)

1.371

Viscosity

1.22 mPa s

Dipole moment

1.74 D

Thermochemistry

Specific
heat capacity C

123.1 J K^-1 mol^-1

Std molar
entropy S^o₂₉₈

158.0 J K^-1 mol^-1

Std enthalpy of
formation Δ_fH^o₂₉₈

-483.88--483.16 kJ mol^-1

Std enthalpy of
combustion Δ_cH^o₂₉₈

-875.50--874.82 kJ mol^-1

Hazards

GHS signal word

Danger

GHS hazard statements

H226, H314

GHS precautionary statements

P280, P305+351+338, P310

EU Index

607-002-00-6

EU classification

C

R-phrases

R10, R35

S-phrases

(S1/2), S23, S26, S45

Flash point

40 °C (104 °F; 313 K)

Explosive limits

4-16%

LD₅₀

3.31 g kg^-1, oral (rat)

Related compounds

Related carboxylic acids

Formic acid
Propionic acid

Related compounds

Acetaldehyde

Acetamide
Acetic anhydride
Acetonitrile
Acetyl chloride
Ethanol
Ethyl acetate
Potassium acetate
Sodium acetate
Thioacetic acid

Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)