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Lauric acid

Lauric acid or systematically, dodecanoic acid, is a saturated fatty acid with a 12-carbon atom chain, thus having many properties of medium chain fatty acids, is a white, powdery solid with a faint odor of bay oil or soap. The salts and esters of lauric acid are known as laurates.

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Further Information

Names

IUPAC nameDodecanoic acid

Other names

-Dodecanoic acid, Dodecylic acid, Dodecoic acid, Laurostearic acid, Vulvic acid, 1-Undecanecarboxylic acid, Duodecylic acid, C12:0 ()

Identifiers

CAS Number: 143-07-7

JSmol: Interactive image

ChEBI: CHEBI:30805

ChEMBL: ChEMBL108766

ChemSpider: 3756

ECHA InfoCard: 100.005.075

EC Number: 205-582-1

IUPHAR/BPS: 5534

KEGG: D10714

PubChem: 3893

Properties

Chemical formula: C12H24O2

Molar mass: 200.32 g·mol

Appearance: White powder

Odor: bay oil

Density: 1.007 g/cm (24 °C)
0.8744 g/cm (41.5 °C)
0.8679 g/cm (50 °C)333

Melting point: 43.8 °C (110.8 °F; 316.9 K)

Boiling point: 297.9 °C (568.2 °F; 571.0 K)
282.5 °C (540.5 °F; 555.6 K)
at 512 mmHg
225.1 °C (437.2 °F; 498.2 K)
at 100 mmHg

Solubility in water: 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)

Solubility: alcohols

Solubility: 12.7 g/100 g (0 °C)
120 g/100 g (20 °C)
2250 g/100 g (40 °C)

Solubility: 8.95 g/100 g (0 °C)
60.5 g/100 g (20 °C)
1590 g/100 g (40 °C)

Solubility: 9.4 g/100 g (0 °C)
52 g/100 g (20 °C)
1250 g/100 g (40 °C)

Solubility: 15.3 g/100 g (0 °C)
97 g/100 g (20 °C)
1410 g/100 g (40 °C)

log : 4.6

Vapor pressure: 2.13·10 kPa (25 °C)
0.42 kPa (150 °C)
6.67 kPa (210 °C)−6

K: 5.3 (20 °C)

Thermal conductivity: 0.442 W/m·K (solid)
0.1921 W/m·K (72.5 °C)
0.1748 W/m·K (106 °C)

Refractive index: 1.423 (70 °C)
1.4183 (82 °C)

Viscosity: 6.88 cP (50 °C)
5.37 cP (60 °C)

Structure

Crystal structure: Monoclinic

Space group: P2/a, No. 14 (α-form)
P, No. 2 (γ-form)11

Point group: 2/m (α-form)
(γ-form)1

Lattice constant: = 9.524 Å, = 4.965 Å, = 35.39 Å (α-form)

Thermochemistry

Specific
heat capacity: 404.28 J/mol·K

Std enthalpy of
formation: −775.6 kJ/mol

Std enthalpy of
combustion: 7377 kJ/mol
7425.8 kJ/mol (292 K)

Hazards

GHS pictograms:

GHS signal word: Danger

GHS hazard statements: H412

GHS precautionary statements: P273

NFPA 704:

Flash point: > 113 °C (235 °F; 386 K)

Related compounds

Related compounds: Glyceryl laurate

Related compounds

Related compounds: Undecanoic acid

Except where otherwise noted, data are given for materials in their(at 25 °C [77 °F], 100 kPa).Except where otherwise noted, data are given for materials in their(at 25 °C [77 °F], 100 kPa).

Infobox references