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CFS-845, Tetramethyl orthosilicate, Cas No. 681-84-5

Tetramethyl orthosilicate Typtical Properties:

Chemical Name

Tetramethyl orthosilicate

Cas No







Clear liquid


min 99%

Tetramethyl orthosilicate

Tetramethyl orthosilicate Description

CFS-845, Tetramethyl orthosilicate is a chemical compound containing four methoxy groups bonded to a silicon atom. It has similar basic properties to CFS-104(Tetraethyl orthosilicate, TEOS). CFS-845 is also named as Tetramethoxysilane, Methyl silicate or abbreviated TMOS. It is the equivalent of Dynasylan M.

Tetramethyl orthosilicate Application

CFS-845 has similar application fields to CFS-104, TEOS. But CFS-104 is usually preferred because of its eco-friendlier hydrolysis product, ethanol.
CFS-845 can be used as a crosslinking agent, a binder or a drying agent in adhesives, coatings and silicone rubbers. It is an important material for sol-gel processing.
CFS-845 can be used as an intermediate for the preparation of organic silicone products.
CFS-845 can be used for optical glass processing and improve the light transmittance.
CFS-845 can be used as an insulation material in electronic industry and a silica source for semiconductors.

Tetramethyl orthosilicate Packaging

CFS-845 is offered in 25L PE pails, 200L PVF steel drums and 1000L IBC totes.
Please contact Co-Formula team for any special packaging request.

Tetramethyl orthosilicate Storage

CFS-845 should be stored in a cool, well-ventilated place, and avoid exposure to humidity.
CFS-845 should be stored in its original containers and used up as soon as possible after opening.
When stored in a strictly sealed and unopened container, CFS-845 has a shelf life of 12months.

Keywords about Co-Formula:
ISO9000 & ISO14000 Certified Manufacturer of Organic Silicone Materials;
Professional manufacturer and supplier of silane coupling agents;
Specialized in silicone oils and silane modified polymers;
Leading producer of specialty functional silanes & siloxanes;

Keywords about Co-Formula Products:
Isocyanate Silanes | Amino Silanes | Mercapto Silanes | Epoxy Silanes | Vinyl Silanes |
Phenyl Silanes | Chloro Silanes | Alkyl & Alkoxy Silanes | Long-chain Silanes |
Crosslinkers & Silazanes | Fluoro Silanes | Methacryloxy Silanes | Silane Intermediates|
Methyl Silicone Fluid | Cyclic & Dual-end Siloxanes | Silane Modified Polymers |  
Functional Silanes Oligomers | Coating Additives | Plastic Additives
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