Wechat Code
Methyltrimethoxysilane (MTMS) CAS Number: 1185-55-3
CAS No. 1185-55-3
Molecular Formula C4H12O3Si
Molecular Weight 136.22
Boiling Point 102℃
Flash Point 11℃
Related Density 0.955
20+ years supplying history;
No claims;
Good and stable quality; Stable supplying;
SGS testing approved; EMTEK, SRICI tested; ISO:90012/ 2015 certified, AAA Credit certified;
Delivery Time: 15-20 days;
Audit acceptable;
Competitive price;
Bigbags Packing; On pallets; IBC packing;
| Testing Item | Standard |
| Silane Content (%) | 99.0 Min |
| Refractive Index (nD25) | 1.36451-1.3655 |
| Appearance | Colorless transparent liquid |
HS code: 2931000090
CAS No.: 1185-55-3
UN No.: 1993
EINECS: 214-685-0
Hazards: 3
Packing Type: II
● Packages:
190kgs iron drum lined with PVF
Handling
1. Flammable liquid and vapor.
2. Avoid breathing vapors or mist.
3. Avoid contact with skin, eyes, and clothing.
4. Use in a well-ventilated area with appropriate exhaust ventilation.
5. Wear suitable PPE: chemical-resistant gloves, safety goggles/face shield, and protective clothing.
6. Keep away from heat, sparks, open flames, and hot surfaces.
7. Ground and bond containers during transfer to prevent static discharge.
8. Avoid contact with moisture — hydrolyzes to form methanol.
9. Wash thoroughly after handling.
Storage
1. Store in a cool, dry, well-ventilated place.
2. Keep container tightly closed to prevent moisture exposure.
3. Protect from heat, ignition sources, and direct sunlight.
4. Store under dry conditions; nitrogen blanketing recommended for bulk storage.
5. Keep away from oxidizing agents, acids, and bases.
6. Use approved flammable liquid storage areas and containers.
7. Follow local regulations for storage of flammable liquids.
1. Silicone Resin Production
MTMS is a primary raw material for:
Methyl silicone resins
Heat-resistant coatings
Electrical insulation varnishes
Anti-corrosion coatings
Its trifunctional structure enables formation of three-dimensional siloxane networks with excellent thermal and weather resistance.
2. Crosslinking Agent in RTV Systems
MTMS functions as a moisture-curable crosslinker in:
RTV silicone sealants
Adhesives
Construction joint sealants
It improves mechanical strength, durability, and adhesion performance.
3. Sol–Gel and Inorganic–Organic Hybrid Materials
MTMS is widely used in sol–gel processes to prepare:
Aerogels
Hydrophobic silica materials
Protective coatings
Transparent thin films
It enables formation of lightweight, porous, and water-repellent structures.
4. Surface Treatment & Hydrophobic Modification
MTMS reacts with hydroxyl-containing substrates such as:
Glass
Concrete
Ceramics
Metal oxides
Applications include:
Water-repellent building treatments
Anti-stain coatings
Surface protection systems
5. Adhesion Promotion
As a coupling agent, MTMS enhances bonding between:
Inorganic fillers
Mineral substrates
Silicone or resin matrices
It improves compatibility and long-term stability.
OUR MARKET
Up till now we’ve developed and supplied to many countries and areas all over the world, with main markets in European countries (Germany, Italy, UK, Spain, Ukraine, Russia, Poland, etc.), USA, South America, Mid East, South-east Asia, Australia, etc. Also seeking more strategic partners and customers under mutual benefits and work through the whole purchasing chain.
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Vietnam
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India
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Belgium
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USA
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Czech Republic
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Mexico
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Colombia
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Singapore
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Ecuador
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Peru
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Russia
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Turkey
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Costa Rica
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Chile
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Indonesia
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Pakistan
Send Inquiry
We are committed to providing you with the best quality service and look forward to communicating with you to solve problems together and bring you a better experience.