Dichloromethylsilane
Dichloromethylsilane (CAS: 75-54-7) is an organosilicon compound with the linear formula CH3SiHCl2 and a molecular weight of 115.03 g/mol. This colourless liquid serves as a valuable intermediate in chemical synthesis, particularly in the production of silicon-based materials and as a reagent for introducing methylsilyl groups. It exhibits a high reactivity, requiring careful handling due to its corrosive nature and flammability.
- IUPAC
- Methyldichlorosilane
- Synonyms
- Methyldichlorosilane

Chemical Synthesis Intermediate
Dichloromethylsilane is a key building block in organosilicon chemistry. Its reactive Si-H and Si-Cl bonds allow for diverse synthetic transformations.
Protecting Group Reagent
It can be employed in organic synthesis for the protection of functional groups. The resulting silyl ethers are typically stable under various reaction conditions.
Surface Modification
The compound can be used to modify surfaces, imparting hydrophobicity or introducing specific chemical functionalities for advanced material applications.
Precursor for Silicone Polymers
Dichloromethylsilane serves as a monomer or co-monomer in the synthesis of specialized silicone polymers and resins.
| Molecular weight | 115.03 |
|---|---|
| Linear formula | CH3SiHCl2 |
| Assay | ≥97% |
| Boiling point | 41 °C(lit.) |
| Density | 1.105 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.398(lit.) |
| Vapour pressure | 6.79 psi (20 °C) |
| Melting point | −93 °C(lit.) |
| Vapour density | 4 (vs air) |
| Autoignition temp | 471 °F |
| Storage temperature | 2-8°C |



Hazard statements
- H225Highly flammable liquid and vapour
- H261In contact with water releases flammable gas
- H301Toxic if swallowed
- H314Causes severe skin burns and eye damage
Precautionary statements
- P210Keep away from heat, sparks and open flames. No smoking
- P231Handle under inert gas
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P301IF SWALLOWED
- P422
| Protective equipment | Faceshields, full-face respirator (US), Gloves, Goggles, multi-purpose combination respirator cartridge (US) |
|---|---|
| Transport (UN / ADR) | UN 1242 4.3/PG 1 |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | F,T |
| Risk statements (R) | 11-14/15-20/22-35-37 |
| Safety statements (S) | 16-26-36/37/39-43-45 |
| Supplemental hazards | Corrosive to the respiratory tract., Reacts violently with water. |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Dichloromethylsilane used for?
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Dichloromethylsilane is primarily used as an intermediate in chemical synthesis, for protection and derivatization reactions, and as a silicon-based synthetic reagent.
What are the CAS number and formula for Dichloromethylsilane?
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The CAS number is 75-54-7 and the linear formula is CH3SiHCl2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Dichloromethylsilane with an assay of ≥97%. We do not represent this product as USP, BP, EP or any other pharmacopoeia grade.
How should Dichloromethylsilane be handled safely?
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Dichloromethylsilane is a highly flammable liquid that reacts violently with water and is corrosive to the respiratory tract and skin. Handle with extreme caution, using appropriate personal protective equipment including a full-face respirator, gloves, and goggles, in a well-ventilated area, away from ignition sources and incompatible materials. Consult the Safety Data Sheet (SDS) for detailed guidance.
Is Dichloromethylsilane a controlled substance?
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The provided data does not indicate that Dichloromethylsilane is a controlled substance.
How is Dichloromethylsilane packed and shipped?
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Dichloromethylsilane is shipped as a hazardous material, UN 1242, Class 4.3, Packing Group I. Packaging adheres to strict international regulations for hazardous goods transport.
How can I request a quote or sample of Dichloromethylsilane?
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To request a quote or a sample, please contact our sales department via the website or provide your details through the online inquiry form.
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