Hexamethoxydisilylethane
Synonyms
1,2-Bis(trimethoxysilyl)ethane;
Bis(trimethoxysilyl)ethane;
2,7-Dioxa-3,6-disilaoctane, 3,3,6,6-tetramethoxy-;
Category
Silicone Surfactant
> Non-ionic Silicone Surfactant
>> Silicate, Silanol and their Derivatives
Chemical Numbering System
CASRN: 18406-41-2
EINECS: 242-285-6
Molecular Formula & Molecular Weight
Molecular Formula: C8H22O6Si2
Molecular Weight: 270.43
Structure
Properties
Appearance (1), colorless liquid.
Solubility insoluble in water. React with water.
Stability stable. Easily hydrolyzed.
Risk Liquid form: irritation, irritation to skin, eye, respiratory system.
GHS (Rev.10) label: 
Animal Toxicity
Table 1 Animal toxicity values
|
rat inhalation LC50 |
2.4ppm/4H[1] |
Ecology may be hazardous to environment. Water body should be given special attention.
Biodegradability biodegradable.
Characteristics excellent film-forming, antistatic, adsorbing, dispersing abilities.
Synthesis
Quality Standards & Test Methods
1, Physical and chemical indexes
|
Item |
Physical and chemical indexes |
|
Liquid |
|
|
Actives, %, ≥ |
95.0 |
Test Methods
(1), Actives
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.
Major Uses
1, Typical applications
Use as film-forming agent.
Use as coupling agent, crosslinking agent.
Manufacturers
References
[1]: ChemIDplus. 18406-41-2, Hexamethoxydisilylethane
Update: 20140828(1); 20200808(2);