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Wiktionary
propanoic acid

n. 1 A colourless liquid with a sharp unpleasant odour; produced by the bacterial breakdown of fatty acids and therefore found in sweat and some cheese. 2 (context organic compound English) The short chain aliphatic carboxylic acid, CH3CH2COOH, used as a preservative, and in the manufacture of many chemical compounds.

WordNet
propanoic acid

n. a liquid fatty acid found in milk and sweat and in fuel distillates [syn: propionic acid]

Wikipedia
Propanoic acid (data page)

| Propionic acid

EINECS number

| Thermodynamic data

Standard enthalpy of formation ΔH°

Standard molar entropy

| Safety data

PEL-TWA ( OSHA)

Autoignition temperature

Explosive limits

| Except where noted otherwise, data are given for
materials in their standard state (at 25°C, 100 kPa)
Infobox disclaimer and references