Dimethyldichlorosilane

Dimethyldichlorosilane

Basic Information

• CAS Number: 75‑78‑5
• Molecular Formula: C₂H₆Cl₂Si
• Molar Mass: 129.06 g/mol
• Appearance: Colorless to pale liquid
• Product Code: D806824
• Pack Size: 1 L

Product Description

Dimethyldichlorosilane (also called dichlorodimethylsilane or DMDCS) is a reactive organosilicon compound used as a key intermediate in organosilicon chemistry. It is widely employed in the synthesis of silicone polymers, specialty silanes, and silicon‑based reagents, serving as a precursor to silicone oils and elastomers.

Storage and Handling

• Store in a cool, dry, well‑ventilated area away from moisture and water, as it reacts vigorously with water to release corrosive gases.
• Keep the container tightly closed and protected from moisture and steam.
• Avoid sources of ignition (heat, sparks, open flames), and keep away from strong oxidizing agents, alcohols, ammonia, and caustic materials.
• Handle with appropriate personal protective equipment (PPE), including gloves and goggles, and work in a well‑ventilated area or fume hood.

Safety Information

Hazards:

• Flammable liquid and vapor (Flam. Liq. 2).
• Reacts violently with water and moisture, releasing toxic and corrosive hydrogen chloride (HCl) and possibly flammable hydrogen gas.

Health Risks:

• Vapors may irritate eyes, skin, and the respiratory system.
• Contact may cause severe irritation or burns.

Personal Protection:

• Wear chemical‑resistant gloves, safety goggles, and protective clothing.
• Use in a fume hood or well‑ventilated workspace to avoid inhalation of fumes.

First Aid:

• Skin Contact: Wash thoroughly with water and remove contaminated clothing.
• Eye Contact: Rinse immediately with plenty of water for at least 15 min and seek medical attention.
• Inhalation: Move to fresh air; seek medical help if symptoms occur.
• Ingestion: Do not induce vomiting; seek medical attention immediately.

Firefighting:

• Use dry chemical, CO₂, or foam extinguishers suitable for flammable liquids.
• Vapors may form explosive mixtures with air.