Molekula
Octyltriethoxysilane
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Octyltriethoxysilane is a silane coupling agent used to improve adhesion between organic materials and inorganic surfaces, commonly in coatings, sealants, and composites. It has a CAS number of 2943-75-1, molecular formula C14H32O3Si, and a molecular weight of 276.49 g/mol. Stored at ambient temperatures, it carries a warning signal word due to potential health and safety hazards. Molekula supplies Octyltriethoxysilane from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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500 g — £51.20 per pack ex VAT · £61.44 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Colourless transparent liquid |
| Density | 0.875-0.885 |
| pH | 6-7 |
| Purity | ≥97.0％ |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 100 °C |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 89986093 |
| CAS Number | 2943-75-1 |
| IUPAC Name | triethoxy(octyl)silane |
| EC Number | 220-941-2 |
| Molecular Formula | C14H32O3Si |
| Molecular Weight | 276.49 |
| Exact Mass | 276.2121 |
| SMILES | CCCCCCCC[Si](OCC)(OCC)OCC |
| InChIKey | MSRJTTSHWYDFIU-UHFFFAOYSA-N |
| InChI | InChI=1S/C14H32O3Si/c1-5-9-10-11-12-13-14-18(15-6-2,16-7-3)17-8-4/h5-14H2,1-4H3 |
| PubChem CID | 76262 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2931.90.90.10 |
| Tariff Code | 2931900090 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- A 137 (coupling agent)
- Caprylyltriethoxysilane
- Dynasylan OCTEO
- Prosil 9202
- Prosil 9234
- Silane, triethoxyoctyl-
- Silquest A 137
- triethoxycaprylylsilane
- Triethoxyoctylsilane
- Y 9187
Frequently asked questions
What is octyltriethoxysilane used for?
It is primarily used as a coupling agent in coatings, adhesives, and sealants to improve adhesion between organic materials and inorganic substrates.
What is the chemical formula and molecular weight of octyltriethoxysilane?
The formula is C14H32O3Si with a molecular weight of 276.49 g/mol.
How should octyltriethoxysilane be stored?
It should be stored at ambient temperature, away from moisture and incompatible materials.
What grade of octyltriethoxysilane does Molekula supply?
Molekula supplies octyltriethoxysilane in technical grade.
Can Molekula supply octyltriethoxysilane in bulk?
Yes, Molekula can supply octyltriethoxysilane in bulk quantities upon request.
What documentation comes with an order of octyltriethoxysilane?
Each order includes a Certificate of Analysis and Safety Data Sheet (SDS) with the shipment.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.