LINOLENIC ACID Chemical Properties

Melting point:

-11 °C(lit.)

Boiling point:

230-232 °C1 mm Hg(lit.)

Density 

0.914 g/mL at 25 °C(lit.)

refractive index 

n20/D 1.480(lit.)

Flash point:

>230 °F

storage temp. 

2-8°C

CAS DataBase Reference

68424-45-3(CAS DataBase Reference)

EPA Substance Registry System

Linseed oil fatty acids (68424-45-3)

Safety Information

Safety Statements 

24/25

WGK Germany 

1

F 

8-10-23

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ACROS

LINOLENIC ACID Usage And Synthesis

Description

α-Linolenic acid (ALA) is an organic compound found in many common vegetable oils. In terms of its structure, it is named all-cis- 9,12,15-octadecatrienoic acid. In physiological literature, it is given the name 18:3 (n?3).
α-Linolenic acid is a carboxylic acid with an 18-carbon chain and three cis double bonds. The first double bond is located at the third carbon from the methyl end of the fatty acid chain, known as the n end. Thus, α-linolenic acid is a polyunsaturated n?3 (omega-3) fatty acid. It is an isomer of gamma-linolenic acid, a polyunsaturated n?6 (omega-6) fatty acid.

Occurrence

Seed oils are the richest sources of α-linolenic acid, notably those of chia, perilla, flaxseed (linseed oil), rapeseed (canola), and soybeans. Alpha-Linolenic acid is also obtained from the thylakoid membranes in the leaves of Pisum sativum (pea leaves). ALA is not suitable for baking, as it will polymerize with itself, a feature exploited in paint with transition metal catalysts. Some ALA will also oxidize at baking temperatures.

History

Alpha-linolenic acid was first isolated by Rollett as cited in J. W. McCutcheon's synthesis in 1942 , and referred to in Green and Hilditch's 1930's survey. It was first artificially synthesized in 1995 from C6 homologating agents. A Wittig reaction of the phosphonium salt of [(Z-Z)-nona-3,6-dien-1-yl]triphenylphosphonium bromide with methyl 9-oxononanoate, followed by saponification, completed the synthesis.

Definition

ChEBI: Alpha-linolenic acid is a linolenic acid with cis-double bonds at positions 9, 12 and 15. Shown to have an antithrombotic effect. It has a role as a micronutrient, a nutraceutical and a mouse metabolite. It is an omega-3 fatty acid and a linolenic acid. It is a conjugate acid of an alpha-linolenate and a (9Z,12Z,15Z)-octadeca-9,12,15-trienoate.

LINOLENIC ACID(68424-45-3)Related Product Information

• SUNFLOWER SEED OIL
• Linolenic acid oil
• Linolenic acid
• Alpha-Linolenic Acid