Elaidic Acid
Synonyms
(E)-9-octadecenoic acid;
18:1Δ9t;
Category
Anionic Surfactant
> Carboxylate
>> Chain Carboxylate
>>> Alkenyl Carboxylate
>>>> Linear Alkenyl Carboxylate
Chemical Numbering System
CAS: 112-79-8
EINECS: 204-006-6
Molecular Formula & Molecular Weight
Molecular Formula: C18H34O2
Molecular Weight: 282.46
Structure
Properties
Appearance (1), white solid.
Odor odor of animal fats or vegetable oils.
Solubility insoluble in water. soluble in ethanol, ether, chloroform, toluene.
Stability stable.
Risk Solid 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 |
100mg/kg[1] |
Ecology may be hazardous to environment. Water body should be given special attention.
Biodegradability biodegradable.
Characteristics excellent lubricating, cleansing, emulsifying, dispersing, solubilizing, antirust abilities. Nonresistant to hard water. Performance is lower than oleic acid.
Note (1), Can not be used in food.
Synthesis
Oleic acid reacts with nitric acid, then obtain.
Quality Standards & Test Methods
1, Physical and chemical indexes
|
Item |
Physical and chemical indexes |
|
Solid |
|
|
Actives, %, ≥ |
98.0 |
|
Elaidic acid, %, ≥ |
70.0 |
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), Elaidic acid
GB/T 9104 Test methods for industrial stearic acids
2, Hazardous substances indexes
|
Item |
Hazardous substances indexes |
|
Solid |
|
|
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.
Major Uses
1, Typical applications
Use as lubricant.
Use as cleansing agent.
Use as emulsifying agent, dispersing agent.
2, Organic synthesis
Used in preparation of elaidic acid esters.
3, Reagent
Use as reagent. For example: chromatographic analysis.
Manufacturers
References
[1]: ChemIDplus. 112-79-8, Elaidic acid
Update: 20131102(1); 20180110(2);