METHYLTRIETHOXYSILANE- ▸ Adhesion promoter: Improves bonding between resins or coatings and mineral and metal substrates.
- ▸ Intermediate: Serves as a building block for siloxane and sol-gel chemistries.
- ▸ Formulation additive: Permitted as an inert ingredient in non-food pesticide products.
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
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Transport classification per the UN Model Regulations / 49 CFR 172.101 Hazardous Materials Table. Confirm against the grade-specific SDS (Section 14) before shipping.
Methyltriethoxysilane (MTES, CAS 2031-67-6) is an ethoxy-functional organosilane that hydrolyzes to methyl-functional siloxane species. It is used as an adhesion and cohesion promoter and as a silane intermediate. It is also permitted as an inert ingredient in non-food pesticide products.
Frequently Asked Questions
What is methyltriethoxysilane?
Methyltriethoxysilane (MTES, CAS 2031-67-6, C7H18O3Si) is an ethoxy-functional organosilane in the silanes and organosilanes family. On contact with moisture its ethoxy groups hydrolyze and condense into methyl-functional siloxane species, making it useful as an adhesion/cohesion promoter and a silane intermediate.
What is methyltriethoxysilane used for?
It is used as an adhesion and cohesion promoter to improve bonding between resins or coatings and mineral and metal substrates, and as an intermediate building block for siloxane and sol-gel chemistries. It is also permitted as an inert ingredient in non-food pesticide formulations.
What is the difference between methyltriethoxysilane and methyltrimethoxysilane?
Both are trifunctional methylsilanes that build methylsiloxane networks, but MTES carries three ethoxy groups while methyltrimethoxysilane (MTMS, CAS 1185-55-3) carries three methoxy groups. The ethoxy version releases ethanol on hydrolysis and cures more slowly; the methoxy version releases methanol and is generally faster-reacting.
What is the HS code for methyltriethoxysilane?
Methyltriethoxysilane is classified under HS heading 2931.90 (other organo-inorganic compounds). Confirm the destination-country tariff subheading with your customs broker for import documentation.
How is bulk methyltriethoxysilane packaged and ordered?
RawSource supplies organosilanes such as MTES in bulk industrial packaging including drums and totes/IBCs to manufacturers and formulators. Because it is moisture-sensitive, it ships in sealed containers; request a current SDS and CoA and submit a bulk quote for volume pricing and MOQ rather than relying on a published list price.