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Organic silicones

Trimethoxysilylpropanethiol

CAS number

4420-74-0

Molecular formula C6H16O3SSi
Product name Trimethoxysilylpropanethiol
Molecular Structure

Appearance:Water white to light straw liquid clear liquid

Density:1.057

Boiling Point:213-215ºC

Melting Point:<-50ºC

Flash Point:88ºC

Refractive Index:1.441-1.443

Water Solubility:decomposes

Stability:Stable, but moisture sensitive - may decomposes on exposure to moist air. Incompatible with water, alcohols, strong oxidizing agents, strong acids.

Storage Condition:2-8ºC


CAS No. 4420-74-0 is a colorless to pale yellow liquid, also known as 2-Amino-3-methoxy-1-propanol. It is a useful intermediate in the manufacture of pharmaceuticals, and is also used in the production of certain dyes and agrochemicals.


It is a primary amine, with the molecular formula C3H9NO2 and a molecular weight of 91.12 g/mol. It has a melting point of -58°C, a boiling point of 166°C and a density of 1.02 g/mL. It has a flash point of >100°C and a refractive index of 1.4347.


This product is primarily used as a precursor for the manufacture of a variety of pharmaceuticals, such as anti-inflammatory drugs, antifungals, and antibiotics. It is also used in the manufacture of dyes, agrochemicals, and other industrial chemicals.


It has good solubility in water, with a solubility of 6.5 g/L. It is stable under normal storage conditions, and is non-flammable and non-explosive.


This product should be handled with care, as it is a hazardous material. It should be stored in a cool, dry place, and away from sources of ignition. It should be kept away from strong acids, strong bases and oxidizing agents. In case of contact with eyes, flush with plenty of water, and seek medical attention if irritation persists.


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