| Nonanoic acid | |
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Nonanoic acid |
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Other names
Pelargonic acid, 1-Octanecarboxylic acid |
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| Identifiers | |
| CAS number | 112-05-0 |
| PubChem | 8158 |
| EC number | 203-931-2 |
| KEGG | C01601 |
| ChEBI | CHEBI:29019 |
| Jmol-3D images | Image 1 |
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| Properties | |
| Molecular formula | C9H18O2 |
| Molar mass | 158.23 g/mol |
| Appearance | Clear to yellowish oily liquid |
| Density | 0.900 g/cm3 |
| Melting point |
12.5 °C |
| Boiling point |
254 °C |
| Solubility in water | 0.3 g/l |
| Acidity (pKa) | 4.96[1] |
| Hazards | |
| R-phrases | R34 |
| S-phrases | (S1/2) S26 S28 S36/37/39 S45 |
| Main hazards | Corrosive (C) |
| NFPA 704 |
1
3
0
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| Flash point | 114 °C |
| Autoignition temperature |
405 °C |
| (verify) (what is: /?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
Nonanoic acid, also called pelargonic acid, is an organic compound composed of a nine-carbon chain terminating in a carboxylic acid with structural formula CH3(CH2)7COOH. Nonanoic acid forms esters—nonanoates. It is a clear, oily liquid with an unpleasant, rancid odor. It is nearly insoluble in water, but very soluble in chloroform, ether, and hexane.
Its refractive index is 1.4322. Its critical point is at 712 K (439 °C) and 2.35 MPa.
Nonanoic acid is a fatty acid which occurs naturally as esters in the oil of pelargonium. Synthetic esters, such as methyl nonanoate, are used as flavorings.
Nonanoic acid is also used in the preparation of plasticizers and lacquers.
The derivative 4-nonanoylmorpholine is an ingredient in some pepper sprays.
The ammonium salt of nonanoic acid, ammonium nonanoate, is used as an herbicide.
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