Arachidic acid Property

Melting point:

74-76 °C(lit.)

Boiling point:

328 °C

Density 

d4100 0.8240

vapor pressure 

0Pa at 25℃

refractive index 

nD100 1.4250

Flash point:

110 °C

storage temp. 

-20°C

solubility 

chloroform: 50 mg/mL, clear, colorless

pka

4.78±0.10(Predicted)

form 

Glistening Powder or Flakes

color 

White

Water Solubility 

practically insoluble

Merck 

14,764

BRN 

1788211

InChIKey

VKOBVWXKNCXXDE-UHFFFAOYSA-N

LogP

1.571 at 33℃

CAS DataBase Reference

506-30-9(CAS DataBase Reference)

NIST Chemistry Reference

Eicosanoic acid(506-30-9)

EPA Substance Registry System

Eicosanoic acid (506-30-9)

Safety

Hazard Codes 

Xi,Xn

Risk Statements 

36/37/38-20/21/22

Safety Statements 

24/25-36-26

WGK Germany 

-

RTECS 

JX3780000

TSCA 

Yes

HazardClass 

IRRITANT

HS Code 

29159000

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P405Store locked up.

Arachidic acid Chemical Properties,Usage,Production

Chemical Properties

Arachidic acid is also known as eicosanoic acid or Icosanoic acid, formula CH3(CH2)18COOH. A widely distributed, but minor, component of the fats of certain edible vegetable oils. Shining, white crystalline leaflets; soluble in ether, slightly soluble in water. Decomposes at 328 C. Commercial product derived from groundnut (peanut) oil. Used in organic synthesis, lubricating greases, waxes, and plastics. Source of arachidyl alcohol.

Occurrence

Arachidic acid is a saturated long-chain fatty acid and a minor constituent of peanut oil, coconut oil and corn oil.

Uses

Arachidic acid is used in the manufacture of pharmaceuticals, soaps, cosmetics, and food packaging because of its surfactant-like properties. Arachidic acid was also used for the dispersion of the monolayer. By addition of an appropriate amount of arachidic acid to a solution of [Eu(tta)3(phen)] in chloroform, stable monolayers consisting of [Eu(tta)3(phen)] and arachidic acid were obtained, and the [Eu(tta)3(phen)] were found to be dispersed homogeneously in the monolayer.

Definition

ChEBI: Icosanoic acid is a C20 striaght-chain saturated fatty acid which forms a minor constituent of peanut (L. arachis) and corn oils. Used as an organic thin film in the production of liquid crystals for a wide variety of technical applications. It has a role as a plant metabolite. It is a straight-chain saturated fatty acid and a long-chain fatty acid. It is a conjugate acid of an icosanoate.

Preparation

Eicosanoic acid is produced by catalytic hydrogenation of arachidonic acid. Arachidonic acid is obtained from food or by desaturation and chain elongation of the plant-rich essential fatty acid, linoleic acid.

Reactions

It has the properties of fatty acids, can react with NaHCO3 to form salts, and with alcohols to form esters and so on.

Flammability and Explosibility

Non flammable

Biochem/physiol Actions

Arachidic acid is a saturated fatty acid with a 20 carbon chain. Arachidic acid occurs naturally in fish and vegetable oils. Diets rich in saturated fats like arachidic acid are associated with increased levels of serum low density lipoproteins.

Purification Methods

Crystallise the C20 acid pKEst
~ from absolute EtOH. [Beilstein 2 IV 1276.]