Triethoxy(ethyl)silane

CAS 78-07-9C2H5Si(OC2H5)3Chemical Synthesis

Triethoxy(ethyl)silane (CAS 78-07-9, C2H5Si(OC2H5)3, MW 192.33) is an organosilicon compound utilised in chemical synthesis and materials science. It serves as a versatile precursor in the preparation of various silicon-containing materials and as a coupling agent to improve adhesion between organic and inorganic surfaces. Its properties make it valuable in microelectronics and organometallic chemistry.

IUPAC: Ethyltriethoxysilane
Synonyms: Ethyltriethoxysilane

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Triethoxy(ethyl)silane (C2H5Si(OC2H5)3) — chemical structure, CAS 78-07-9; Chemistry, fine chemical supplied by Tech Serve Solutions

Chemical SynthesisMaterials ScienceMicro/NanoElectronicsOrganometallic ReagentsOrganosiliconTri-Alkoxy & Greater SilanesTrialkoxysilanes More...

01 /Applications

Chemical Synthesis Intermediate

Triethoxy(ethyl)silane acts as a building block for more complex organosilicon compounds. It can be used in sol-gel processes and for the synthesis of functionalised silica materials.

Adhesion Promoter

This silane can improve the bond strength between organic polymers and inorganic substrates such as glass or metal. It functions by forming covalent bonds at the interface, enhancing durability and performance.

Surface Modification

It is employed to modify the surface properties of materials, imparting hydrophobicity or enabling further chemical functionalisation. This is particularly relevant in micro/nanoelectronics for coating applications.

Precursor for Materials Science

Triethoxy(ethyl)silane is used in the development of advanced materials, including specialised coatings and composite materials, due to its controlled reactivity and ability to incorporate ethyl groups into silicon-based networks.

02 /Properties

Molecular weight	192.33
Linear formula	C2H5Si(OC2H5)3
Assay	96%
Boiling point	158-160 °C(lit.)
Density	0.895 g/mL at 25 °C(lit.)
Refractive index	n20/D 1.392(lit.)

03 /Safety & handling

GHS hazard pictogram: Flammable (GHS02) — Flammable

Warning

Hazard statements

H226Flammable liquid and vapour

Protective equipment	Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter
Flash point	43 °C / 109.4 °F
Transport (UN / ADR)	UN 1993C 3 / PGIII
Water hazard class (WGK, DE)	2
Risk statements (R)	10
Safety statements (S)	7/9

Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.

04 /Identifiers & registry

CAS number

78-07-9

MDL number

MFCD00026754

PubChem substance

24867610

Beilstein registry

1362028

05 /Quality & supply

Documentation

Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.

Supply & logistics

Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.

06 /Frequently asked questions

What is Triethoxy(ethyl)silane used for?

Triethoxy(ethyl)silane is used as a chemical synthesis intermediate, adhesion promoter, and for surface modification in materials science and microelectronics.

What is the CAS number and formula for Triethoxy(ethyl)silane?

The CAS number is 78-07-9 and the molecular formula is C2H5Si(OC2H5)3.

What grade and purity does Tech Serve Solutions supply?

Tech Serve Solutions supplies Triethoxy(ethyl)silane with a minimum assay of 96%. We do not represent this product as USP, BP, or EP grade unless explicitly stated.

How should Triethoxy(ethyl)silane be handled safely?

Triethoxy(ethyl)silane is a flammable liquid and vapour (H226). Handle with appropriate personal protective equipment, including eyeshields, gloves, and respiratory protection, in a well-ventilated area away from ignition sources.