Lauric acid
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"Laurate" redirects here. For the honorary title, see Laureate.
Lauric acid, systematically dodecanoic acid, is a saturated fatty acid with a 12-carbon atom chain, thus having many properties of medium-chain fatty acids.[6] It is a bright white, powdery solid with a faint odor of bay oil or soap. The salts and esters of lauric acid are known as laurates.
Quick Facts Names, Identifiers ...
Names | |
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Preferred IUPAC name
Dodecanoic acid | |
Other names
n-Dodecanoic acid, Dodecylic acid, Dodecoic acid,
Laurostearic acid, Vulvic acid, 1-Undecanecarboxylic acid, Duodecylic acid, C12:0 (Lipid numbers) | |
Identifiers | |
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3D model (JSmol) |
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ChEBI | |
ChEMBL | |
ChemSpider |
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ECHA InfoCard | 100.005.075 |
EC Number |
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KEGG |
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PubChem CID |
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UNII | |
CompTox Dashboard (EPA) |
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Properties | |
C12H24O2 | |
Molar mass | 200.322 g·mol−1 |
Appearance | White powder |
Odor | Slight odor of bay oil |
Density | 1.007 g/cm3 (24 °C)[1] 0.8744 g/cm3 (41.5 °C)[2] 0.8679 g/cm3 (50 °C)[3] |
Melting point | 43.8 °C (110.8 °F; 316.9 K)[3] |
Boiling point | 297.9 °C (568.2 °F; 571.0 K) 282.5 °C (540.5 °F; 555.6 K) at 512 mmHg[1] 225.1 °C (437.2 °F; 498.2 K) at 100 mmHg[3][4] |
37 mg/L (0 °C) 55 mg/L (20 °C) 63 mg/L (30 °C) 72 mg/L (45 °C) 83 mg/L (100 °C)[5] | |
Solubility | Soluble in alcohols, diethyl ether, phenyls, haloalkanes, acetates[5] |
Solubility in methanol | 12.7 g/100 g (0 °C) 120 g/100 g (20 °C) 2250 g/100 g (40 °C)[5] |
Solubility in acetone | 8.95 g/100 g (0 °C) 60.5 g/100 g (20 °C) 1590 g/100 g (40 °C)[5] |
Solubility in ethyl acetate | 9.4 g/100 g (0 °C) 52 g/100 g (20°C) 1250 g/100 g (40°C)[5] |
Solubility in toluene | 15.3 g/100 g (0 °C) 97 g/100 g (20°C) 1410 g/100 g (40°C)[5] |
log P | 4.6[6] |
Vapor pressure | 2.13·10−6 kPa (25 °C)[6] 0.42 kPa (150 °C)[4] 6.67 kPa (210 °C)[7] |
Acidity (pKa) | 5.3 (20 °C)[6] |
Thermal conductivity | 0.442 W/m·K (solid)[2] 0.1921 W/m·K (72.5 °C) 0.1748 W/m·K (106 °C)[1] |
Refractive index (nD) |
1.423 (70 °C)[1] 1.4183 (82 °C)[3] |
Viscosity | 6.88 cP (50 °C) 5.37 cP (60 °C)[2] |
Structure | |
Monoclinic (α-form)[8] Triclinic, aP228 (γ-form)[9] | |
P21/a, No. 14 (α-form)[8] P1, No. 2 (γ-form)[9] | |
2/m (α-form)[8] 1 (γ-form)[9] | |
α = 90°, β = 129.22°, γ = 90° | |
Thermochemistry | |
Heat capacity (C) |
404.28 J/mol·K[4] |
Std enthalpy of formation (ΔfH⦵298) |
−775.6 kJ/mol[6] |
Std enthalpy of combustion (ΔcH⦵298) |
7377 kJ/mol 7425.8 kJ/mol (292 K)[4] |
Hazards | |
GHS labelling: | |
Danger | |
H412[7] | |
P273[7] | |
NFPA 704 (fire diamond) | |
Flash point | > 113 °C (235 °F; 386 K)[7] |
Related compounds | |
Related compounds |
Glyceryl laurate |
Related compounds | |
Related compounds |
Undecanoic acid Tridecanoic acid Dodecanol Dodecanal Sodium lauryl sulfate |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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