Pelargonic acid
Fatty acid / From Wikipedia, the free encyclopedia
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Pelargonic acid, also called nonanoic acid, is an organic compound with structural formula CH3(CH2)7CO2H. It is a nine-carbon fatty acid. Nonanoic acid is a colorless oily liquid with an unpleasant, rancid odor. It is nearly insoluble in water, but very soluble in organic solvents. The esters and salts of pelargonic acid are called pelargonates or nonanoates.
Quick Facts Names, Identifiers ...
Names | |
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Preferred IUPAC name
Nonanoic acid | |
Other names
Nonoic acid; nonylic acid; 1-octanecarboxylic acid; C9:0 (lipid numbers) | |
Identifiers | |
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3D model (JSmol) |
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1752351 | |
ChEBI | |
ChemSpider |
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ECHA InfoCard | 100.003.574 |
EC Number |
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185341 | |
KEGG |
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PubChem CID |
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UNII | |
CompTox Dashboard (EPA) |
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Properties | |
C9H18O2 | |
Molar mass | 158.241 g/mol |
Appearance | Clear to yellowish oily liquid |
Density | 0.900 g/cm3 |
Melting point | 12.5 °C (54.5 °F; 285.6 K) |
Boiling point | 254 °C (489 °F; 527 K) |
Critical point (T, P) | 439 °C (712 K), 2.35 MPa |
0.3 g/L | |
Acidity (pKa) |
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Refractive index (nD) |
1.4322 |
Hazards | |
Occupational safety and health (OHS/OSH): | |
Main hazards |
Corrosive |
GHS labelling: | |
Warning | |
H315, H319, H412 | |
P264, P273, P280, P302+P352, P305+P351+P338, P321, P332+P313, P337+P313, P362, P501 | |
NFPA 704 (fire diamond) | |
Flash point | 114 °C (237 °F; 387 K) |
405 °C (761 °F; 678 K) | |
Related compounds | |
Related compounds |
Octanoic acid, decanoic acid |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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The acid is named after the pelargonium plant, since oil from its leaves contains esters of the acid.