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Organic silicones

Octadecyltrimethoxysilane

CAS number

3069-42-9

Molecular formula C21H46O3Si
Product name Octadecyltrimethoxysilane
Molecular Structure

Appearance:light yellow liquid.

Density:0.883

Boiling Point:170ºC (0.1 mmHg)

Melting Point:13-17ºC

Flash Point:139ºC

Refractive Index:1.438-1.44

Stability:Stable. Incompatible with strong oxidizing agents. Moisture sensitive.


CAS No:3069-42-9 is an aromatic, colorless liquid with a molecular weight of 142.2 g/mol. It is a member of the family of chemicals known as alkylbenzene sulfonates (ABS). This chemical is used as a surfactant in a variety of industrial and consumer products, including detergents, soaps, degreasers, and paint removers.


This chemical has a low order of toxicity and is not expected to cause serious health effects when used as directed. Inhalation of high concentrations of vapor or mist may cause irritation to the nose and throat and possibly lead to lung damage. Prolonged skin contact may cause irritation, redness, and blisters. Eye contact can result in irritation and pain.


CAS No:3069-42-9 is used as a surfactant in a variety of industrial and consumer products, including detergents, soaps, degreasers, and paint removers. It is a highly effective wetting agent and emulsifier, and can be used to reduce the surface tension of water. This chemical is also an effective dispersant, providing improved cleaning performance and better soil suspension.


CAS No:3069-42-9 is an aromatic, colorless liquid that is relatively stable and non-flammable. It is soluble in water and is biodegradable in the environment. This chemical is not expected to accumulate in the environment or cause long-term adverse effects.


In conclusion, CAS No:3069-42-9 is a highly effective surfactant with low toxicity, making it an ideal choice for use in a variety of industrial and consumer products. It is stable, non-flammable, and biodegradable in the environment, and is not expected to cause long-term adverse effects.


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