Trimethoxysilylpropanethiol
Synonym(s):(3-Mercaptopropyl)trimethoxysilane;3-(Trimethoxysilyl)-1-propanethiol
- CAS NO.:4420-74-0
- Empirical Formula: C6H16O3SSi
- Molecular Weight: 196.34
- MDL number: MFCD00004901
- EINECS: 224-588-5
- SAFETY DATA SHEET (SDS)
- Update Date: 2025-01-27 09:38:02

What is Trimethoxysilylpropanethiol?
Chemical properties
Water white to light straw liquid clear liquid with an unpleasant odour of sulphide.
The Uses of Trimethoxysilylpropanethiol
(3-Mercaptopropyl)trimethoxysilane is used as a capping molecule for cadmium sulphide nanocrystals. It is used in the preparation of multi-walled carbon nanotubes and bilayer modified gold electrode. It acts as a linker molecule used in the preparation of gold multilayers and as a molecular adhesive in the fabrication of vapor-deposited gold electrodes on glass substrates. It is also used as a precursor for silica.
What are the applications of Application
MPTMS can be coated with TiO2, CeO2 and La2O3 for protection against corrosion on quaternary bronze in urban atmosphere. It can also be used as a silica nanofluid (NF) to modify the surface of berea sandstone to improve the enhanced oil recovery (EOR) area in the petroleum industry. MPTMS forms composites with kaolin, that can be used as an absorbent for the removal of heavy metals from wastewater. MPTMS can form a bilayer with multiwalled carbon nanotubes (MWNTs) on gold electrodes which can be used to study the electrochemical properties of fluphenazine.
What are the applications of Application
(3-Mercaptopropyl)trimethoxysilane is a useful chemical for silicate glass surface modification by Thiol–Ene Polymerization
Preparation
(3-Mercaptopropyl)trimethoxysilane was prepared by using thiourea and 3-chloropropyltrimethoxysilane as raw materials, petroleum ether as solvent, KI as catalyst, and ethylenediamine as neutraliser.
General Description
(3-mercaptopropyl)trimethoxysilane (MPTMS) is an organosilane with a thiol group, which can be used as a self-assembled monolayer (SAM). It can be used as a conjunction reagent to immobilize a variety of nanoparticles.
Properties of Trimethoxysilylpropanethiol
Melting point: | <-50°C |
Boiling point: | 213-215 °C(lit.) |
Density | 1.057 g/mL at 25 °C(lit.) |
vapor pressure | 0.2 hPa (20 °C) |
refractive index | n |
Flash point: | 204 °F |
storage temp. | 2-8°C |
solubility | Miscible with methanol, ethanol, isopropanol, acetone, benzene, toluene and xylene. |
form | Liquid |
pka | 10.47±0.10(Predicted) |
Specific Gravity | 1.04 |
color | Clear colorless to light yellow |
Water Solubility | decomposes |
Sensitive | Air & Moisture Sensitive |
Hydrolytic Sensitivity | 7: reacts slowly with moisture/water |
BRN | 2038119 |
Stability: | Stable, but moisture sensitive - may decomposes on exposure to moist air. Incompatible with water, alcohols, strong oxidizing agents, strong acids. |
CAS DataBase Reference | 4420-74-0(CAS DataBase Reference) |
NIST Chemistry Reference | 1-Propanethiol, 3-(trimethoxysilyl)-(4420-74-0) |
EPA Substance Registry System | 1-Propanethiol, 3-(trimethoxysilyl)- (4420-74-0) |
Safety information for Trimethoxysilylpropanethiol
Signal word | Warning |
Pictogram(s) |
![]() Exclamation Mark Irritant GHS07 ![]() Environment GHS09 |
GHS Hazard Statements |
H302:Acute toxicity,oral H317:Sensitisation, Skin H411:Hazardous to the aquatic environment, long-term hazard |
Precautionary Statement Codes |
P273:Avoid release to the environment. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. |
Computed Descriptors for Trimethoxysilylpropanethiol
InChIKey | UUEWCQRISZBELL-UHFFFAOYSA-N |
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