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Methyl methoxy silane-Surface treatment agent


Methyl trimethoxysilane is a chemical whose molecular formula is CH3Si(CH3O)3. It is mainly used as a crosslinking agent for room temperature vulcanized silicone rubber, as well as a surface treatment agent for glass fiber and reinforced plastic laminates. External treatment agent.

Chemical name: Methyl trimethoxysilane

Structural formula: CH3Si(OCH3)3     Molecular formula: C4H12O3Si

Molecular weight: 136.2218               CAS: 1185-55-3

EINECS: 214-685-0

Function and purpose

Methyl chloride and silicon powder are directly synthesized in the presence of cuprous chloride catalyst in the next step to generate a mixture of methylchlorosilane, which is purified by distillation to obtain the product dimethyldichlorosilane, and then separated and purified by vacuum distillation.

Technical indicators

Appearance colorless transparent liquid
Silicone content% ≥ 99.0
Density (25°C) g/cm3 0.950±0.020
Refractive index (nD25) 1.3645-1.3655
pH 6.5-7.0


Store in a cool, dry and well-ventilated warehouse. High fire, heat source, storage temperature no more than 25℃, relative temperature no more than 75%, packaging must be sealed and kept away from moisture. It should be stored separately from oxidants and acids, and avoid mixed storage. Use explosion-proof lighting and ventilation facilities. It is forbidden to use mechanical equipment and tools that are prone to sparks. The storage area should be equipped with leakage emergency treatment equipment and suitable storage materials.


airtight packaging in iron or plastic drums. Net weight: 25kg, 190kg.


Do not touch the open flame, store in a cool and dry place, with a shelf life of 6 months.


Prevent rain and sun exposure, and transport as non-dangerous goods.

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