ChemicalBook >> CAS DataBase List >>Octadecyltrimethoxysilane
Octadecyltrimethoxysilane
- CAS No.
- 3069-42-9
- Chemical Name:
- Octadecyltrimethoxysilane
- Synonyms
- TriMethoxy;N-OCTADECYLTRIMETHOXYSILANE;TRIMETHOXYOCTADECYLSILANE;DK261;DK729;OctadecyltriMethoxys;STEARYLTRIMETHOXYSILANE;Octadecyltrimethoxysilan;trimethoxyoctadecyl-silan;OCTADECYLTRIMETHOXYSILANE
- CBNumber:
- CB3403134
- Molecular Formula:
- C21H46O3Si
- Molecular Weight:
- 374.67
- MDL Number:
- MFCD00043060
- MOL File:
- 3069-42-9.mol
- MSDS File:
- SDS
- TDS File:
- TDS
Last updated:2026-05-28 06:26:03
| Melting point | 16-17 °C(lit.) |
|---|---|
| Boiling point | 170 °C (0.1 mmHg) |
| Density | 0.883 g/mL at 25 °C(lit.) |
| vapor pressure | 0.001Pa at 25℃ |
| refractive index |
n |
| Flash point | 284 °F |
| storage temp. | Inert atmosphere,Room Temperature |
| solubility | Chloroform (Slightly) |
| form | liquid |
| color | Colourless |
| Specific Gravity | 0.883 |
| Water Solubility | 190-437000ng/L at 20℃ |
| Hydrolytic Sensitivity | 7: reacts slowly with moisture/water |
| BRN | 5791830 |
| Stability | Stable. Incompatible with strong oxidizing agents. Moisture sensitive. |
| InChI | 1S/C21H46O3Si/c1-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19-20-21-25(22-2,23-3)24-4/h5-21H2,1-4H3 |
| InChIKey | SLYCYWCVSGPDFR-UHFFFAOYSA-N |
| SMILES | CCCCCCCCCCCCCCCCCC[Si](OC)(OC)OC |
| LogP | 6 |
| CAS DataBase Reference | 3069-42-9(CAS DataBase Reference) |
| FDA UNII | A5R7Q56VX6 |
| NIST Chemistry Reference | Octadecyltrimethoxysilane(3069-42-9) |
| EPA Substance Registry System | Silane, trimethoxyoctadecyl- (3069-42-9) |
| UNSPSC Code | 12352103 |
| NACRES | NA.23 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H315-H319-H335 | |||||||||
| Precautionary statements | P280-P261 | |||||||||
| PPE | Eyeshields, Gloves, type ABEK (EN14387) respirator filter | |||||||||
| Hazard Codes | Xi | |||||||||
| Risk Statements | 36/37/38 | |||||||||
| Safety Statements | 26-36 | |||||||||
| WGK Germany | 1 | |||||||||
| F | 10-21 | |||||||||
| TSCA | TSCA listed | |||||||||
| HS Code | 29319090 | |||||||||
| Storage Class | 10 - Combustible liquids | |||||||||
| REACH Registrations | Active | |||||||||
| NFPA 704 |
|
Octadecyltrimethoxysilane price More Price(33)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 376213 | Trimethoxy(octadecyl)silane technical grade, 90% | 3069-42-9 | 5ml | $57.2 | 2026-04-30 | Buy |
| Sigma-Aldrich | 376213 | Trimethoxy(octadecyl)silane technical grade, 90% | 3069-42-9 | 25ml | $186 | 2026-04-30 | Buy |
| TCI Chemical | O0256 | Octadecyltrimethoxysilane >85.0%(GC) | 3069-42-9 | 25mL | $86 | 2026-04-30 | Buy |
| Usbiological | 286233 | Octadecyl-trimethoxysilane Asreported | 3069-42-9 | 50g | $389 | 2026-06-03 | Buy |
| Usbiological | 286233 | Octadecyl-trimethoxysilane Asreported | 3069-42-9 | 100g | $573 | 2026-06-03 | Buy |
Octadecyltrimethoxysilane Chemical Properties, Uses, Production
Chemical Properties
Colorless transparent liquid
Uses
For preparing hydrophobic coatings and self-assembled monolayers.
Uses
OTS is used for the development of self assembled monolayers(SAMs). OTS is also used to modify the silica dielectric surface in organic field effect transistors.
General Description
Trimethoxy(octadecyl)silane (OTS) is an important alkylsilane that can form strong covalent bonds with silicon oxide and serves as a potential lubricant for micro electro mechanical systems (MEMS). OTS is largely used for surface chemical modification, modifying silica resulted in an increased charge carrier mobility for a variety of vacuum deposited and solution cast organic semiconductors.
Octadecyltrimethoxysilane Preparation Products And Raw materials
Raw materials
Preparation Products
Global Suppliers ( 308)
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Hubei kefule Material Technology Co., Ltd | 027-84459282 13720265353 | zhou@cfmats.com | China | 359 | 58 |
| Weihai Zhaochuan Biotechnology Co., Ltd. | 13863193635 | 53702483@qq.com | China | 401 | 58 |
| Nanjing Quanxi New Materials Co., Ltd | 025-58183162-0 18021540488 | 1094405027@qq.com | China | 69 | 58 |
| Shanghai Boyle Chemical Co., Ltd. | 021-50182298 021-50180596 | sales@boylechem.com | China | 2202 | 55 |
| Tianjin Zhongxin Chemtech Co., Ltd. | 022-66880623 | sales@tjzxchem.com | China | 612 | 60 |
| J & K SCIENTIFIC LTD. | 18210857532 18210857532 | jkinfo@jkchemical.com | China | 96815 | 76 |
| Meryer (Shanghai) Chemical Technology Co., Ltd. | 4006356688 18621169109 | market03@meryer.com | China | 40202 | 62 |
| INTATRADE GmbH | +49 3493/605464 | sales@intatrade.de | Germany | 3563 | 66 |
| TCI (Shanghai) Development Co., Ltd. | 021-67121386 | Sales-CN@TCIchemicals.com | China | 24512 | 81 |
| Beijing HwrkChemical Technology Co., Ltd | 89508211 18501085097 | sales.bj@hwrkchemical.com | China | 9407 | 55 |
Related articles
- Multifaceted Studies on Octadecyltrimethoxysilane: From Air/Water Interface Reactions to Nanodevice Applications
- Octadecyltrimethoxysilane (OTMS) is an organosilicon compound which is used for preparing hydrophobic coatings and self-assemb....
- Apr 7,2025
View Latest Price from Octadecyltrimethoxysilane manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-09-14 | n-Octadecyltrimethoxysilane
3069-42-9
|
96% | 200tons | Hubei Changfu Chemical Co., Ltd. | |||
 |
2026-09-02 | n-Octadecyltrimethoxysilane
3069-42-9
|
$8.00 | 1KG | 99% | Henan Fengda Chemical Co., Ltd | ||
 |
2026-08-18 | n-OCTADECYLTRIMETHOXYSILANE
3069-42-9
|
1KG | 98.00% | 1000KG /month | Shanghai Daken Advanced Materials Co.,Ltd |
-
- n-Octadecyltrimethoxysilane
3069-42-9
- 96%
- Hubei Changfu Chemical Co., Ltd.
-
- n-Octadecyltrimethoxysilane
3069-42-9
- $8.00
- 99%
- Henan Fengda Chemical Co., Ltd
-
- n-OCTADECYLTRIMETHOXYSILANE
3069-42-9
- $0.00
- 98.00%
- Shanghai Daken Advanced Materials Co.,Ltd
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1of4
OCTADECYLTRIMETHOXYSILANE
STEARYLTRIMETHOXYSILANE
Silane, trimethoxyoctadecyl-
Trimethoxysilyloctadecane
18,18,18-trimethoxyoctadecylsilicon
TriMethoxy(octadecyl)silane technical grade, 90%
trimethoxyoctadecyl-silan
TRIMETHOXYOCTADECYLSILANE
OCTADECYLTRIMETHOXYSILANE, TECH., 90%
OCTADECYLTRIMETHOXYSILANE TECH 90%
N-OCTADECYLTRIMETHOXYSILANE 95+%
N-OCTADECYLTRIMETHOXYSILANE (85% N-ISOMER)
Octadecyltrimethoxysilan
n-Octodecyltrimethoxysilane
Octadecyltrimethoxysilane, 90% ,tech.,
1-(Trimethoxysilyl)octadecane
OctadecyltriMethoxysilane, tech., 90% 25ML
Stearyltrimethoxysilane
Trimethoxyoctadecylsilane
OctadecyltriMethoxys
TriMethoxy(octadecyl)sila
OctodecyltriMethoxysilane
Octadecyltrimethoxysilane>
Trimethoxy(octadecyl)silane,90%
Aksci Technical GradeCtadecyl-Trimethoxysilane
TIANFUCHEM--3069-42-9--Octadecyltrimethoxysilane in stock
DK261
DK729
Octadecyltrimethoxysilane (>85%)
Octadecyltrimethoxysilane,90%
Trimethoxy(octadecyl)silane,95%
Octadecyltrimethoxysilane IOTA 51251
N-OCTADECYLTRIMETHOXYSILANE
TriMethoxy
n-Octadecyltrimethoxysllane
Octadecyltrimethoxysilane（ODTMS）
3069-42-9
CH3CH217SiOCH33
C21H46O3Si
C21H46O4Si
Organometallic Reagents
Organosilicon
Silane Coupling Agents (Intermediates)
Trialkoxysilanes
Si-O Compounds
Si (Classes of Silicon Compounds)
Silane Coupling Agents
Alkoxy Silanes
Hydrophobing Agents
Alkyl
Functional Materials
Si (Classes of Silicon Compounds)
Silane Coupling Agents
Silane Coupling Agents (Intermediates)
Si-O Compounds
Trialkoxysilanes
