CG-501 (CAS No. 681-84-5)

Chemical Name: Tetramethoxysilane
Molecular Formula: C4H12O4Si
Structural Formula:
Molecular Weight: 152.2
CAS No. : 681-84-5 (TMOS)

Physical Properties of Tetramethoxysilane:

Physical Form :Transparent liquid
Color: Clear, colorless
Specific Gravity at 25/25°C: 1.023
Boiling Point, °C: 121-122
Refractive Index, nD 25°C: 1.367-1.370
Flash Point, Pensky-Martens Closed Cup (1), °C: 26


Tetramethoxysilane (CAS NO.681-84-5) named TMOS abroad is mainly used as insulating materials for the electronics industry and as treatment agent and coagulating agent for optical glass and silicone synthesis. This product can be used to produce heat-resistant, chemical-resistant coatings, silicone solvent and precision casting adhesives. It also is a widely used intermediate in organic synthesis.

Packaging and Storage:

Tetramethoxysilane can be packed in 200KG drum, IBC and ISO tank.
The container is sealed and stored in cool and well ventilated place away from fire and water.


The information provided herein was believed by Jiangxi Chenguang New Materials Co., Ltd. to be accurate at the time of preparation or prepared from sources believed to be reliable, but it is the responsibility of the user to investigate and understand other pertinent sources of information, to comply with all laws and procedures applicable to the safe handling and use of tetramethoxysilane, and to determine the suitability of the product for user's intended application or use. All products supplied by Chenguang are subject to Chenguang's standard terms and conditions of sale. CHENGUANG MAKES NO WARRANTY, EXPRESS OR IMPLIED, CONCERNING THE PRODUCT OR THE MERCHANTABILITY OR FITNESS THEREOF FOR ANY PURPOSE OR CONCERNING THE ACCURACY OF ANY INFORMATION PROVIDED BY CHENGUANG, except that the product shall conform to Chenguang’s specifications. Nothing contained herein constitutes an offer for the sale of any product.

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