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Silane USi-6107 – Methyltrichlorosilane (MTCS)
Highly Reactive Chloro-Functional Organosilane for Specialty Silicone Synthesis
CAS No.: 75-79-6
EINECS No.: 200-902-6
Molecular Weight: 149.48 g/mol
Synonyms:
Trichloromethylsilane; MTCS; M1Silane USi-6107 is a high-purity methyltrichlorosilane (MTCS)—a highly reactive chloro-functional organosilane featuring one methyl group and three chlorine atoms bonded to silicon. It serves as a critical building block in the synthesis of methyl-functional silicones, including methyl alkoxysilanes, silicone resins, and specialty waterproofing agents. Due to its extreme reactivity with moisture, it must be handled under strictly anhydrous conditions.
🧪 Product Description
Chemical Formula: CH₃SiCl₃
Chemical Structure:
![Structure: CH₃–SiCl₃]USi-6107 is not a coupling agent for direct use in composites or coatings. Instead, it is a key intermediate in organosilicon chemistry:
- The three Si–Cl bonds are highly susceptible to hydrolysis, reacting violently with water to form methylsilanetriol, which rapidly condenses into methylsiloxane networks
- Used to synthesize methyltrimethoxysilane (USi-6101) and methyltriethoxysilane (USi-6102) via alcoholysis
- Essential raw material for methyl-containing silicone resins, water repellents, and sodium methylsiliconate
⚠️ Important: MTCS is flammable, explosive, toxic, and corrosive. It releases hydrogen chloride (HCl) upon contact with moisture—requiring rigorous safety protocols.
📊 Typical Technical Data
The following values are typical and not intended for specification. Please confirm with our technical team before finalizing product requirements.
Parameter Specification Appearance Colorless or light yellow transparent liquid, with malodorous odor Refractive Index (nD25) 1.446 – 1.456 Relative Density (water = 1) 1.273 Purity (GC, %) ≥ 99.0% Trimethylchlorosilane ≤ 0.05%
🏭 Key Applications
🔹 Primary Raw Material for Methyl Alkoxysilanes
- Reacted with methanol or ethanol to produce:
- Methyltrimethoxysilane (MTMS, USi-6101)
- Methyltriethoxysilane (MTES, USi-6102)
- These derivatives are widely used as crosslinkers, hydrophobizing agents, and sol-gel precursors
🔹 Synthesis of Silicone Resins
- Provides the methyl-functional monomer unit in MQ, MT, and MDT-type silicone resins
- Imparts thermal stability, water repellency, and flexibility to resin networks
🔹 Manufacture of Waterproofing Agents
- Used to produce sodium methylsiliconate—a common water-repellent for concrete, masonry, and textiles
- Also used in specialty coatings requiring deep penetration and durable protection
🔹 Intermediate in Organosilicon Chemistry
- Building block for methyl-containing silsesquioxanes, hybrid polymers, and functional silicones
⚠️ Critical Safety & Handling Notes
- Extremely moisture-sensitive: Reacts violently with water, releasing corrosive HCl gas
- Flammable and explosive: Keep away from heat, sparks, and open flame
- Toxic and corrosive: Causes severe skin/eye burns and respiratory irritation
- Storage: In original sealed containers under dry, inert atmosphere (e.g., N₂), at or below 35°C
- Shelf Life: 12 months from production date when unopened and properly stored
- PPE Required: Chemical-resistant gloves, goggles, face shield, fume hood, and acid gas respirator
- SDS Mandatory: Always review the latest Safety Data Sheet at www.usi-chemical.com or upon request before handling
📦 Packaging
Supplied in corrosion-resistant, moisture-tight containers:
- 25 L pail
- 200 L drum
- 1,000 L IBC tote
All packaging is designed for safe transport and storage of reactive chlorosilanes.
📞 Contact Us
Nanjing Union Silicon Chemical Co., Ltd.
Specialist in High-Reactivity Chlorosilanes for Advanced Silicone Manufacturing- Headquarters:
Room 2002, Overseas Chinese Plaza, No.1 Daqiao North Road, Nanjing 210031, Jiangsu, P.R. China - Factory Address:
Dongcheng Guanli District, Gaizhou 115200, Liaoning, P.R. China - Tel: +86-25-5889 5266 / 5889 5699
- Fax: +86-25-5830 5349
- Website: www.usi-chemical.com
- Email: inquiry@usichemical.com
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