Barium Stearate
Synonyms
Stearic acid, barium salt;
Octadecanoic acid, barium salt;
Barium octadecanoate;
Category
Anionic Surfactant
> Carboxylate
>> Chain Carboxylate
>>> Alkyl Carboxylate
>>>> Linear Alkyl Carboxylate
Chemical Numbering System
CAS: 6865-35-6
EINECS: 229-966-3
Molecular Formula & Molecular Weight
Molecular Formula: C36H70BaO4；C36H72O4.Ba
Molecular Weight: 704.27
Structure
Properties
Appearance (1), white powder.
Solubility insoluble in water. soluble in benzene, toluene.
Hygroscopicity hygroscopic.
Stability stable.
Risk Solid form: toxic (high toxic), 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
|
rat oral LD50 |
2506mg/kg[1] |
|
mouse oral LD50 |
1832mg/kg[1] |
|
mouse intraperitoneal LD50 |
319mg/kg[1] |
|
guinea pig oral LD50 |
3600mg/kg[1] |
Ecology be hazardous to environment. Water body should be given special attention.
Biodegradability biodegradable.
Characteristics excellent lubricating, emulsifying, dispersing abilities.
Synthesis
(1), Sodium stearate reacts with barium chloride solution, then obtain.
(2), Stearic acid reacts with barium hydroxide from non-aqueous medium, then obtain.
Quality Standards & Test Methods
1, Physical and chemical indexes
|
Item |
Physical and chemical indexes |
|
Solid |
|
|
Actives, %, ≥ |
95.0 |
|
Ba, % |
|
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), Ba
2, Hazardous substances indexes
|
Item |
Hazardous substances indexes |
|
Solid |
|
|
Heavy metals (as Pb, except Ba), 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, Product standards
(1), Chinese standards
(1a), HG/T 2338 Barium stearate (light)
4, 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 emulsifying agent, dispersing agent.
Use as high temperature lubricant.
2, Plastics
Heat stabilizers, lubricants in polyethylene processing.
Best long-term stability of PVC soaps stabilizers.
3, Rubber
Softening agent in rubber.
4, Coatings
Drier, flatting agent in paint.
5, Machinery industry
Use as high temperature lubricant, high temperature releasing agent.
Manufacturers
References
[1]: ChemIDplus. 6865-35-6, Barium stearate
Update: 20131102(1); 20171215(2);