Arachidonic acid
Synonyms
(5Z,8Z,11Z,14Z)-5,8,11,14-Eikosatetraensaeure;
5,8,11,14-Eicosatetraenoic acid, (all-Z)-;
(all-Z)-5,8,11,14-Eicosatetraenoic acid;
5,8,11,14-Eicosatetraenoic acid, (all-Z)-;
Icosa-5,8,11,14-tetraenoic acid;
AA;
ARA;
Category
Anionic Surfactant
> Carboxylate
>> Chain Carboxylate
>>> Alkenyl Carboxylate
>>>> Linear Polyenyl Carboxylate
Chemical Numbering System
CAS: 506-32-1
EINECS: 208-033-4
Molecular Formula & Molecular Weight
Molecular Formula: C20H32O2
Molecular Weight: 304.47
Structure
Properties
Appearance (1), pale yellow liquid.
Solubility insoluble in water, soluble in ethanol.
Stability stable. Easily oxidized.
Risk Liquid form: flammable material; irritation, irritation to skin, eye, respiratory system. Harmful products of combustion are CO, CO2 and so on. Contact with strong oxidants, can cause to burn.
GHS label: 
Animal Toxicity
Table 1 Animal toxicity values
|
mouse intravenous LD50 |
39.2mg/kg[1] |
Ecology may be hazardous to environment. Water body should be given special attention.
Biodegradability biodegradable.
Characteristics excellent lubricating, emulsifying, dispersing, solubilizing, cleansing abilities.
Synthesis
Quality Standards & Test Methods
1, Physical and chemical indexes
|
Item |
Physical and chemical indexes |
|
Liquid |
|
|
Actives, %, ≥ |
95.0 |
Test Methods
(1), Actives
GB/T 13173 Surface active agents -- Detergents -- Testing methods
GB/T 5173 Surface active agents and detergents -- Determination of anionic-active matter by direct two-phase titration procedure
ISO 2271 Surface active agents -- Detergents -- Determination of anionic-active matter by manual or mechanical direct two-phase titration procedure
2, Hazardous substances indexes
|
Item |
Hazardous substances indexes |
|
Liquid |
|
|
Heavy metals (as Pb), mg/kg, ≤ |
20 |
|
As, mg/kg, ≤ |
3 |
Test Methods
(1), Heavy metals (as Pb)
Safety and Technical Standards for Cosmetics (2015 Edition)
GB/T 30799 The test method of food detergents -- Determination of heavy metals
(2), As
Safety and Technical Standards for Cosmetics (2015 Edition)
GB/T 30797 The test method of food detergents -- Determination of total arsenic
3, Further explanation
(a), On physical and chemical indexes: firstly, shall be indicated carbon atom distribution; secondly, shall be indicated average molecular weight.
(b), Used in cosmetics, should be test for harmful substances; or furtherly test for microorganisms.
Major Uses
1, Typical applications
Use as lubricant.
Use as cleansing agent.
Use as emulsifying agent, dispersing agent.
2, Personal care products
Conditioning agent, emollient in personal care products.
3, Food
Use as food nutritive fortifier.
4, Organic synthesis
Use as intermediate in organic synthesis, for example, pilot substance of synthesis of prostaglandin, thromboxane, leukotriene.
5, Machinery industry
Lubricant in metal processing.
Manufacturers
References
[1]: ChemIDplus. 506-32-1, Arachidonic acid
Update: 20180526(1);