Triethoxyoctylsilane
- CAS No.
- 2943-75-1
- Chemical Name:
- Triethoxyoctylsilane
- Synonyms
- N-OCTYLTRIETHOXYSILANE;TRIETHOXYCAPRYLYLSILANE;OCTYLTRIETHOXYSILANE;OCTEO;Dynasylan OCTEO;TRIETHOXY-N-OCTYLSILANE;A 137;U-222;y9187;CO9835
- CBNumber:
- CB7284241
- Molecular Formula:
- C14H32O3Si
- Molecular Weight:
- 276.49
- MDL Number:
- MFCD00039883
- MOL File:
- 2943-75-1.mol
- MSDS File:
- SDS
- TDS File:
- TDS
| Melting point | <-40°C |
|---|---|
| Boiling point | 84-85 °C0.5 mm Hg(lit.) |
| Density | 0.88 g/mL at 25 °C(lit.) |
| vapor pressure | 0.1 hPa (20 °C) |
| refractive index |
n |
| Flash point | 210 °F |
| storage temp. | Store below +30°C. |
| solubility | Acetonitrile (Slightly), Chloroform (Slightly) |
| form | liquid |
| Specific Gravity | 0.875 |
| color | Colorless to Almost colorless |
| Odor | Mild odor |
| Viscosity | 1.68mm2/s |
| Water Solubility | reacts |
| Sensitive | Moisture Sensitive |
| Hydrolytic Sensitivity | 7: reacts slowly with moisture/water |
| BRN | 2325287 |
| Cosmetics Ingredients Functions | BINDING |
| 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 |
| InChIKey | MSRJTTSHWYDFIU-UHFFFAOYSA-N |
| SMILES | CCCCCCCC[Si](OCC)(OCC)OCC |
| LogP | -0.3-6.41 at 20℃ |
| CAS DataBase Reference | 2943-75-1(CAS DataBase Reference) |
| EWG's Food Scores | 1 |
| FDA UNII | LDC331P08E |
| NIST Chemistry Reference | N-Octyltriethoxysilane(2943-75-1) |
| EPA Substance Registry System | Triethoxyoctylsilane (2943-75-1) |
| UNSPSC Code | 12352103 |
| NACRES | NA.23 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H315 | |||||||||
| Precautionary statements | P264-P280-P302+P352-P332+P313-P362+P364 | |||||||||
| PPE | Eyeshields, Gloves, type ABEK (EN14387) respirator filter | |||||||||
| Hazard Codes | Xi | |||||||||
| Risk Statements | 36/37/38 | |||||||||
| Safety Statements | 26-36-37/39 | |||||||||
| WGK Germany | 1 | |||||||||
| RTECS | VV6695500 | |||||||||
| F | 10-21 | |||||||||
| TSCA | TSCA listed | |||||||||
| HS Code | 29310095 | |||||||||
| Storage Class | 10 - Combustible liquids | |||||||||
| Hazard Classifications | Skin Irrit. 2 | |||||||||
| Toxicity | LD50 orally in Rabbit: 5110 mg/kg LD50 dermal Rabbit 5142 mg/kg | |||||||||
| REACH Registrations | Active | |||||||||
| NFPA 704 |
|
Triethoxyoctylsilane price More Price(42)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 8.14414 | Triethoxyoctylsilane for synthesis | 2943-75-1 | 100mL | $66.2 | 2026-04-30 | Buy |
| Sigma-Aldrich | 440213 | Triethoxy(octyl)silane 97% | 2943-75-1 | 100ml | $71 | 2026-04-30 | Buy |
| Sigma-Aldrich | 440213 | Triethoxy(octyl)silane 97% | 2943-75-1 | 1l | $194 | 2026-04-30 | Buy |
| TCI Chemical | O0171 | Triethoxy-n-octylsilane >97.0%(GC) | 2943-75-1 | 25mL | $19 | 2026-04-30 | Buy |
| TCI Chemical | O0171 | Triethoxy-n-octylsilane >97.0%(GC) | 2943-75-1 | 100mL | $32 | 2026-04-30 | Buy |
Triethoxyoctylsilane Chemical Properties, Uses, Production
Description
Triethoxyoctylsilane is a monomeric medium-chain alkylfunctional silane. It is a clear colourless liquid and soluble in common non-polar organic solvent.
Triethoxyoctylsilane can be used as a surface modifier to generate hydrophobicity (e.g. on concrete, glass, inorganic pigments, or mineral fillers).
When diluted with an appropriate solvent, it can be used in the formulation of water repellent products. Upon proper application, the formulated product will penetrate and provide water repellency by chemically reacting with the cementitious substrate. Treated substrates are hydrophobic and retain their original appearance.
Chemical Properties
Colorless transparent liquid
Uses
Triethoxy(octyl)silane is a hydrophobization agent used to limit coalescence in solid-stabilized emulsions.
Definition
ChEBI: Octyltriethoxysilane is an organosilicon compound.
General Description
Triethoxy(octyl)silane (TEOS) is an alkoxide organosilane with four ethyl ester sidechains. It is used as a self-assembled monolayer and provides a hydrophobic coating with low surface energy. The water contact angle is in the range of 150-170°.
Synthesis
111-66-0
998-30-1
78-10-4
2943-75-1
The typical experimental procedure (Table 2, entry 1) was as follows: Ni(acac)2 (1a) (1.3 mg, 0.005 mmol) was dissolved in THF (5 mL) at room temperature, and 1-octene (112 mg, 1.0 mmol) and triethoxysilane (164 mg, 1.0 mmol) were added sequentially under stirring. After stirring the mixed solution for 1 min, NaBHEt3 (1.0 M in THF, 5 mL, 0.005 mmol) was added and the reaction mixture was subsequently heated to 50 °C. This temperature was maintained and the reaction progress was monitored by gas chromatography (GLC). Upon completion of the reaction, homotrimethylbenzene (60 mg, 0.50 mmol) was added to the mixture as an internal standard.GLC analysis showed the products to be n-octyltriethoxysilane (0.90 mmol, 90%) and tetraethyl silicate (0.05 mmol, 5%). The reaction solution was concentrated under vacuum and the residue was purified by gel permeation chromatography (GPC) using toluene as eluent to give n-octyltriethoxysilane (234 mg, 0.85 mmol, 85%). The 1H, 13C{1H} and 29Si{1H} NMR spectra of the isolated compounds were in agreement with the data reported in the literature. Similar methods were applied to the hydrogenosilylation of other silanes with 1,3-dienes/olefins/alkynes, except for the reactions, which were carried out at room temperature (Table 2, entries 2-3). The 1H/13C NMR spectral data of the new compounds are detailed in the Supplementary Material.
in vivo
Triethoxyoctylsilane (10 mg/kg, intratracheal instillation, single dose) does not induce significant lung toxicity in rats, only transient and reversible inflammatory response
| Animal Model: | Crl:CD (SD)IGS BR rats exposed to TESO-coated TiO2 particles[1] |
| Dosage: | 2 mg/kg and 10 mg/kg |
| Administration: | Intratracheal instillation, single dose, followed by monitoring at 24 hours, 1 week, 1 month, and 3 months |
| Result: | Induced transient pulmonary inflammation (10 mg/kg), characterized by increased neutrophils in BAL fluid, which resolved completely within 1 week, with no significant lung toxicity. |
References
[1] Journal of Organometallic Chemistry, 2016, vol. 809, p. 57 - 62
Triethoxyoctylsilane Preparation Products And Raw materials
Raw materials
Preparation Products
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| HUANSHAN KBR CHEMICAL CO., LTD | 0559-2335676-658 18155919527; | johnxu@kbrchem.com | China | 126 | 55 |
| Chembridge International Corp.(Taipei/Dongguan/Nanjing) | 025-84712192 | china@chembridge.net | China | 192 | 62 |
| Nanjing Quanxi New Materials Co., Ltd | 025-58183162-0 18021540488 | 1094405027@qq.com | China | 69 | 58 |
| Zhongshan Xingrui Chemical Co. , Ltd. | 13380886747 | 1322625950@qq.com | China | 1408 | 58 |
| HUANGSHANJIAHUASILICONE CO,LTD | 15212785412; 15212785412 | hsuzihang@163.com | China | 63 | 58 |
| Jiangxi Hungpai New Material Co., Ltd. | 13986673315 | karma@hungpai.sina.net | China | 25 | 58 |
| Aifute (Tianjin) New Materials Co., Ltd | 18756952323 18756942323 | 825482787@qq.com | China | 55 | 58 |
| 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 |
| Alfa Aesar | 400-6106006 | saleschina@alfa-asia.com | China | 30103 | 84 |
Related articles
- Triethoxyoctylsilane: Versatile Applications in Superhydrophobic Coatings and Surface Modification
- Triethoxyoctylsilane enables superhydrophobic, flame-retardant coatings on fabrics, forms self-assembled monolayers on silica.
- Jun 24,2025
View Latest Price from Triethoxyoctylsilane manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-09-17 | Triethoxyoctylsilane
2943-75-1
|
1kg /Drum | ≥98% | 50 T/Month | Hebei Qujie Technology Co., Ltd. | ||
 |
2026-09-17 | Triethoxyoctylsilane
2943-75-1
|
$1.00 | 1KG | 99% | 1000mt/year | Jinan Finer Chemical Co., Ltd | |
 |
2026-09-02 | Triethoxyoctylsilane
2943-75-1
|
$8.00 | 1KG | 99% | Henan Fengda Chemical Co., Ltd |
-
- Triethoxyoctylsilane
2943-75-1
- $0.00
- ≥98%
- Hebei Qujie Technology Co., Ltd.
-
- Triethoxyoctylsilane
2943-75-1
- $1.00
- 99%
- Jinan Finer Chemical Co., Ltd
-
- Triethoxyoctylsilane
2943-75-1
- $8.00
- 99%
- Henan Fengda Chemical Co., Ltd
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