Trimethoxy(propyl)silane
Propyltrimethoxysilane (CAS: 1067-25-0), with the molecular formula CH3CH2CH2Si(OCH3)3 and a molar mass of 164.27 g/mol, is an organosilicon compound. It serves as a valuable intermediate in chemical synthesis, particularly within organometallic and organosilicon chemistry. This trialkoxysilane is supplied by Tech Serve Solutions with an assay of 97%.
- IUPAC
- Propyltrimethoxysilane

Chemical Synthesis Intermediate
Used as a building block in the synthesis of more complex organosilicon compounds and materials. Its reactivity allows for the introduction of propyl groups and silane functionalities into various molecular structures.
Crosslinking Agent
Can function as a crosslinking agent in polymer systems, enhancing material properties such as durability and chemical resistance. The methoxy groups can hydrolyze and condense to form siloxane networks.
Surface Modification
Applied in surface treatment applications to alter the properties of materials, such as imparting hydrophobicity or improving adhesion. The silane moiety can bond to inorganic surfaces.
| Molecular weight | 164.27 |
|---|---|
| Linear formula | CH3CH2CH2Si(OCH3)3 |
| Assay | 97% |
| Boiling point | 142 °C(lit.) |
| Density | 0.932 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.391(lit.) |
| Vapour pressure | 0.15 psi (20 °C) |


Hazard statements
- H226Flammable liquid and vapour
- H319Causes serious eye irritation
Precautionary statements
- P305IF IN EYES
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 36 °C / 96.8 °F |
| Transport (UN / ADR) | UN 1993C 3 / PGIII |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 10-36 |
| Safety statements (S) | 26 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
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.
What is Propyltrimethoxysilane used for?
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Propyltrimethoxysilane is primarily used as an intermediate in chemical synthesis, particularly in organometallic and organosilicon chemistry, and for surface modification applications.
What is the CAS number and formula for Propyltrimethoxysilane?
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The CAS number is 1067-25-0 and the linear formula is CH3CH2CH2Si(OCH3)3.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Propyltrimethoxysilane with an assay of 97%. We do not represent this product as meeting USP, BP, EP, or other pharmacopoeia standards.
How should Propyltrimethoxysilane be handled safely?
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Propyltrimethoxysilane is a flammable liquid and an eye irritant (H226, H319). Handle in a well-ventilated area, away from ignition sources. Wear appropriate personal protective equipment, including eyeshields, gloves, and a suitable respirator. In case of contact, follow P305 + P351 + P338 instructions.
How is Propyltrimethoxysilane packed and exported?
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Propyltrimethoxysilane is typically packed in compliance with UN 1993 C 3 / PGIII regulations for safe transport. TSS exports globally, adhering to all relevant shipping and customs requirements.
How can I request a sample or quote?
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To request a sample or a quote for Propyltrimethoxysilane, please contact our sales department via the website or by phone.
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