3-Mercaptopropyltriethoxysilane
Synonym(s):3-Triethoxysilyl-1-propanethiol
- CAS NO.：14814-09-6
- Empirical Formula: C9H22O3SSi
- Molecular Weight: 238.42
- MDL number: MFCD00053924
- EINECS: 238-883-1
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-01-13 11:27:10
What is 3-Mercaptopropyltriethoxysilane?
Chemical properties
Clear to straw liquid with unpleasant odor of sulfide.
The Uses of 3-Mercaptopropyltriethoxysilane
It can improve the properties of the mineral-filled elastomer, including modulus, tensile and tear strength, heat buildup, abrasion resistance, resilience. It can be used as a pretreatment on minerals or added at the time of compounding. Mineral-reinforced rubbers such as shoe soles, rollers, wheels, white sidewalls, wire and cable insulation are the common case (3-Mercaptopropyl)triethoxysilane, could be used in. It also finds it uses as an intermediate, in polymer and tire manufacture, and as a laboratory reagent.
Flammability and Explosibility
Not classified
Properties of 3-Mercaptopropyltriethoxysilane
| Boiling point: | 210 °C |
| Density | 0.987 g/mL at 20 °C (lit.) |
| vapor pressure | 0-7910Pa at 25℃ |
| refractive index | 1.4331 |
| Flash point: | 88°C |
| storage temp. | 2-8°C |
| form | clear liquid |
| pka | 10.39±0.10(Predicted) |
| Specific Gravity | 0.932 |
| color | Colorless to Almost colorless |
| Water Solubility | Hydrolyzes slowly in water. |
| Sensitive | Moisture Sensitive |
| Hydrolytic Sensitivity | 7: reacts slowly with moisture/water |
| BRN | 2039575 |
| CAS DataBase Reference | 14814-09-6(CAS DataBase Reference) |
| EPA Substance Registry System | 1-Propanethiol, 3-(triethoxysilyl)- (14814-09-6) |
Safety information for 3-Mercaptopropyltriethoxysilane
| Signal word | Warning |
| Pictogram(s) |
 Environment GHS09 |
| GHS Hazard Statements |
H411:Hazardous to the aquatic environment, long-term hazard |
| Precautionary Statement Codes |
P273:Avoid release to the environment. P391:Collect spillage. Hazardous to the aquatic environment P501:Dispose of contents/container to..… |
Computed Descriptors for 3-Mercaptopropyltriethoxysilane
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