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Names | |||
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Preferred IUPAC name
Acetic acid[3] | |||
Systematic IUPAC name
Ethanoic acid | |||
Other names | |||
Identifiers | |||
3D model (JSmol)
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3DMet | |||
Abbreviations | AcOH | ||
506007 | |||
ChEBI | |||
ChEMBL | |||
ChemSpider | |||
DrugBank | |||
ECHA InfoCard | 100.000.528 | ||
EC Number |
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E number | E260 (preservatives) | ||
1380 | |||
KEGG | |||
MeSH | Acetic+acid | ||
PubChem CID
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RTECS number |
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UNII | |||
UN number | 2789 | ||
CompTox Dashboard (EPA)
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Properties | |||
CH3COOH | |||
Molar mass | 60.052 g·mol−1 | ||
Appearance | Colourless liquid | ||
Odor | Heavily vinegar-like | ||
Density | 1.049 g/cm3 (liquid); 1.27 g/cm3 (solid) | ||
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 | ||
Miscible | |||
log P | −0.28[4] | ||
Vapor pressure | 1.54653947 kPa (20 °C) 11.6 mmHg (20 °C)[5] | ||
Acidity (pKa) | 4.756 | ||
Conjugate base | Acetate | ||
−31.54·10−6 cm3/mol | |||
Refractive index (nD)
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1.371 (VD = 18.19) | ||
Viscosity | 1.22 mPa s 1.22 cP | ||
1.74 D | |||
Thermochemistry | |||
Heat capacity (C)
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123.1 J/(K⋅mol) | ||
Std molar
entropy (S⦵298) |
158.0 J/(K⋅mol) | ||
Std enthalpy of
formation (ΔfH⦵298) |
−483.88–483.16 kJ/mol | ||
Std enthalpy of
combustion (ΔcH⦵298) |
−875.50–874.82 kJ/mol | ||
Pharmacology | |||
G01AD02 (WHO) S02AA10 (WHO) | |||
Legal status |
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Hazards | |||
GHS labelling: | |||
Danger | |||
H226, H314 | |||
P280, P305+P351+P338, P310 | |||
NFPA 704 (fire diamond) | |||
Flash point | 40 °C (104 °F; 313 K) | ||
427 °C (801 °F; 700 K) | |||
Explosive limits | 4–16% | ||
Lethal dose or concentration (LD, LC): | |||
LD50 (median dose)
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3.31 g/kg, oral (rat) | ||
LC50 (median concentration)
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5620 ppm (mouse, 1 h) 16000 ppm (rat, 4 h)[7] | ||
NIOSH (US health exposure limits): | |||
PEL (Permissible)
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TWA 10 ppm (25 mg/m3)[6] | ||
REL (Recommended)
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TWA 10 ppm (25 mg/m3) ST 15 ppm (37 mg/m3)[6] | ||
IDLH (Immediate danger)
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50 ppm[6] | ||
Related compounds | |||
Related carboxylic acids
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Formic acid Propionic acid | ||
Related compounds
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Acetaldehyde Acetamide Acetic anhydride Chloroacetic acid Acetyl chloride Glycolic acid Ethyl acetate Potassium acetate Sodium acetate Thioacetic acid | ||
Supplementary data page | |||
Acetic acid (data page) | |||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa).
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