Methyltrichlorosilane
Pharmaceutical Materials 2025-03-02
Methyltrichlorosilane
CAS No.: 75-79-6 | EC No.: 200-900-5
Molecular Formula: CH₃Cl₃Si | Molecular Weight: 149.48 g/mol
1. Basic Properties
| Parameter | Specification |
|---|---|
| Appearance | Colorless to light yellow liquid |
| Purity | ≥98.0% (GC) |
| Melting Point | -77°C |
| Boiling Point | 66°C |
| Density (25°C) | 1.273 g/mL |
| Flash Point | -28°C (Highly flammable) |
| Refractive Index | 1.408 (20°C) |
2. Key Applications
- Silicone Production:
- Key intermediate for methylsilicone resins/oils
- Crosslinking agent in silicone rubbers
- Surface Treatment:
- Hydrophobic coatings for glass/fibers
- Electronics:
- Precursor for semiconductor-grade silicon
3. Reactivity & Handling
| Aspect | Details |
|---|---|
| Hydrolysis | Violent reaction with water (release HCl gas) |
| Storage | Dry inert atmosphere (N₂/Ar), <25°C |
| Incompatibles | Strong oxidizers, bases, moisture |
4. Safety & Regulatory
| Hazard Code | GHS Classification |
|---|---|
| H224 | Extremely flammable liquid/vapor |
| H314 | Causes severe skin burns/eye damage |
| H331 | Toxic if inhaled |
PPE Requirements:
- Chemical-resistant gloves (Viton®)
- Face shield + vapor respirator
- Explosion-proof equipment
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