Methyltriethoxysilane (CAS No. 2031-67-6) is an organosilane compound containing one methyl group and three hydrolyzable ethoxy groups bonded to silicon. It is commonly abbreviated as MTES.
The three Si–OCH₂CH₃ groups can undergo hydrolysis and subsequent condensation, allowing Methyltriethoxysilane to function as a silane coupling agent, surface modifier, crosslinking reagent, and precursor for siloxane and organosilica materials.
Methyltriethoxysilane is used in sol-gel chemistry, surface modification, silicone and polymer materials, coatings, composites, and organic-inorganic hybrid materials. TCI categorizes it under silane coupling agents, alkyl silanes, organosilicon compounds, and organic-inorganic hybrid materials.
The three ethoxy groups of Methyltriethoxysilane are reactive toward water. Under suitable conditions, the Si–OC₂H₅ groups undergo hydrolysis to form silanol-containing species.
The resulting silanol groups can then undergo condensation to form Si–O–Si bonds, producing siloxane or organosilica networks.
This reaction behavior makes Methyltriethoxysilane useful for:
The methyl group remains attached to the silicon center during hydrolysis and condensation. This organic substituent can contribute hydrophobic characteristics to the resulting silicon-containing material.
Therefore, Methyltriethoxysilane can be used to adjust:
Methyltriethoxysilane can be used to modify inorganic surfaces and tailor organic-inorganic interfaces.
Applications include:
The hydrolysis and condensation of Methyltriethoxysilane make it useful as a precursor for organosilicon and hybrid sol-gel materials.
Applications include:
Methyltriethoxysilane can participate in siloxane network formation and is used in silicone-related material research.
Applications include:
Thermo Fisher specifically identifies Methyltriethoxysilane as a material used in the production of silicone polymers or silicone resin.
Methyltriethoxysilane can be incorporated into surface-treatment and coating systems.
Applications include:
Methyltriethoxysilane can be used in research involving inorganic fillers and organic polymer matrices.
Applications include:
The combination of three reactive ethoxy groups and one methyl group provides a useful structural platform for controlling the properties of silicon-containing materials.
Applications include:
TCI describes Methyltriethoxysilane/Triethoxymethylsilane as moisture sensitive and recommends storage in a cool, dark location below 15°C under inert gas. TCI also reports a flash point of 23°C and classifies it as a flammable liquid and vapor.
Researchers working in the following fields may benefit from Methyltriethoxysilane (CAS No. 2031-67-6):
A: Methyltriethoxysilane is an organosilane compound with CAS No. 2031-67-6, molecular formula C₇H₁₈O₃Si, and molecular weight 178.30 g/mol.
A: Yes. Methyltriethoxysilane and Triethoxymethylsilane are names for the same compound, CAS 2031-67-6. NIST lists both names for this CAS number.
A: MTES is a commonly used abbreviation for Methyltriethoxysilane.
A: It is mainly used as an organosilane reagent for surface modification, sol-gel synthesis, silicone materials, coatings, polymer composites, and organic-inorganic hybrid materials.
A: Yes. Its three ethoxy groups can undergo hydrolysis in the presence of water. TCI specifically identifies the compound as moisture sensitive.
A: The molecular weight is 178.30 g/mol. NIST gives a calculated molecular weight of 178.3015.
A: The molecular formula is C₇H₁₈O₃Si.
A: Yes. Its hydrolyzable ethoxy groups make it suitable as a precursor for siloxane, organosilica, and organic-inorganic hybrid materials.
