Potassium Oleate
Synonyms
Potassium (Z)-9-octadecenoate;
9-Octadecenoic acid, potassium salt, (Z)-;
9-Octadecenoic acid (9Z)-, potassium salt;
Category
Anionic Surfactant
> Carboxylate
>> Chain Carboxylate
>>> Alkenyl Carboxylate
>>>> Linear Alkenyl Carboxylate
Chemical Numbering System
CAS: 143-18-0
EINECS: 205-590-5
Molecular Formula & Molecular Weight
Molecular Formula: C18H33KO2; C18H34O2.K
Molecular Weight: 320.55
Structure
Properties
Appearance (1), white to yellow powder; (2), pale yellow to brown paste; (3), pale yellow to brown liquid.
Odor odor of animal fats or vegetable oils.
Solubility soluble in water. soluble in ethanol.
Stability stable. Easily oxidized.
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 oral LD50 |
> 5000mg/kg[1] |
|
rat inhalation LD50 |
5610mg/kg[1] |
|
rat oral LD50 |
> 5000mg/kg[1] |
|
rat skin LD50 |
> 2000mg/kg[1] |
Ecology may be hazardous to environment. Water body should be given special attention.
Biodegradability biodegradable.
Characteristics excellent cleansing, emulsifying, dispersing, solubilizing, lubricating, foaming abilities. Nonresistant to hard water. Typical ingredient in soap.
Synthesis
Oleic acid reacts with potassium hydroxide solution, then obtain.
Quality Standards & Test Methods
1, Physical and chemical indexes
|
Item |
Physical and chemical indexes |
|
Solid |
|
|
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 |
|
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.
(b), Used in cosmetics, should be test for harmful substances; or furtherly test for microorganisms.
Major Uses
1, Typical applications
Use as cleansing agent.
Use as emulsifying agent, dispersing agent.
Use as lubricant.
Use as foaming agent.
2, Household detergents
Use as cleansing agent.
3, Personal care products
Emulsifying agent in personal care products.
4, Machinery industry
Lubricant in metal processing, machinery.
5, Pets
Use as cleansing agent, emulsifying agent.
6, Industrial cleaning
Cleansing agent in industrial cleaning products.
7, Organic synthesis
Use as catalyst.
Manufacturers
References
[1]: ChemIDplus. 143-18-0, Potassium cis-9-octadecenoic acid
Update: 20131102(1); 20180112(2);