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Trimethylchlorosilane (M3) CAS Number: 75-77-4
CAS No. 75-77-4
Molecular Formula (CH3)3SiCl
Molecular Weight 108.64
Melting Point -40℃
Boiling Point 57.6℃
Flashing Point -18℃
Vapour Pressure 13.33kPa (25℃)
Related Density 0.85g/cm3 (25℃)
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 |
| Assay (%) | 99.0 Min |
| Refractive Index (n 25D) | 1.389 |
| Appearance | Colorless Transparent Liquid |
HS code: 2931000090
CAS No.: 75-77-4
EINECS: 200-900-5
UN No.: 1298
Hazardous Grade: 3 (8)
Packing Type: II
● Packages:
170 kgs iron drum.
Handling
1. Moisture sensitive and corrosive — reacts with water to release hydrogen chloride (HCl) gas.
2. Avoid breathing vapors or fumes.
3. Avoid contact with skin, eyes, and clothing.
4. Handle in a dry, well-ventilated area with local exhaust ventilation.
5. Use under inert atmosphere (e.g., nitrogen) when possible.
6. Wear appropriate PPE: chemical-resistant gloves (butyl rubber/Viton®), safety goggles/face shield, flame-resistant protective clothing, and respiratory protection if required.
7. Keep away from water, moisture, alcohols, amines, and strong bases.
8. Ground/bond containers during transfer to prevent static discharge.
9. Emergency eyewash and safety shower should be readily available.
Storage
1. Store in a cool, dry, well-ventilated area away from moisture and humidity.
2. Keep containers tightly sealed and protected from water exposure.
3. Store under dry inert gas (nitrogen blanketing) if possible.
4. Protect from heat, sparks, and open flames.
5. Store in corrosion-resistant containers (carbon steel or approved lined containers).
6. Keep away from oxidizing agents, water, alcohols, and bases.
7. Provide secondary containment to prevent accidental release.
8. Follow local regulations for flammable and corrosive materials.
1. Silylation Agent in Organic Synthesis
Used to protect hydroxyl groups (-OH) in alcohols, phenols, and carboxylic acids.
Forms trimethylsilyl ethers, which are more volatile and easier to handle in reactions.
Common in GC/MS sample preparation for volatile derivatives.
Protects functional groups in multi-step organic syntheses.
2. Silicone & Organosilicon Production
Precursor for polysiloxanes, silicone oils, and resins.
Reacts with water or alcohols to form siloxanes.
Used to modify surfaces to make them hydrophobic or water-repellent.
3. Chromatography / Analytical Chemistry
Derivatization of polar compounds for gas chromatography analysis.
Converts carboxylic acids, alcohols, and amines into trimethylsilyl derivatives.
Improves volatility, thermal stability, and peak shape in GC analysis.
4. Surface Treatment / Coatings
Functionalizes glass, silica, or other oxide surfaces.
Produces hydrophobic coatings, anti-sticking layers, or silane coupling layers.
Used in microelectronics or glass fiber treatments.
5. Specialty Applications
Used in pharmaceutical intermediates as a protective group reagent.
Can be used in organometallic reactions or as a reagent in fine chemical synthesis.
Sometimes used in polymer modification for hydrophobicity and adhesion improvement.
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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USA
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Mexico
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