Product Name: Chloromethyltrichlorosilane
Synonyms: Trichloromethylchlorosilane, Silane, trichloro(chloromethyl)-
Chemical Formula: CCl3H3Si
CAS Number: 1558-25-4
Recommended Use: Synthesis of organosilicon compounds, specialty chemical manufacturing
Supplier Identification: Name, address, phone number provided in commercial transaction records
Emergency Phone Number: National chemical safety hotline, local health and fire department contacts
Classification: Corrosive to metals, acute toxic, causes severe skin burns and eye damage, toxic if inhaled
Pictograms: Corrosion, Skull and Crossbones, Exclamation Mark
Hazard Statements: Contact with water liberates toxic fumes, severe respiratory irritation, chemical burns to skin and eyes
Precautionary Statements: Use only outdoors or in well-ventilated areas, avoid breathing vapors, wear protective gloves/clothing/eye/face protection
Signal Word: Danger
Hazards Not Otherwise Classified: Incompatible with water, can release hydrogen chloride gas
Chemical Name: Chloromethyltrichlorosilane
CAS Number: 1558-25-4
Percent (%): >98
Impurities and Stabilizing Additives: None relevant for hazard classification
Molecular Weight: 181.45 g/mol
Inhalation: Remove to fresh air, provide oxygen or artificial respiration if breathing is difficult, contact physician immediately
Skin Contact: Remove all contaminated clothing, flush skin with plenty of water for at least 15 minutes, seek medical attention for chemical burns
Eye Contact: Rinse cautiously with water for several minutes, lift upper and lower eyelids occasionally, remove contact lenses, get prompt medical attention
Ingestion: Do not induce vomiting, rinse mouth with water only if conscious, obtain emergency medical help
Most Important Symptoms: Severe pain, blistering, vision loss, respiratory distress, gastrointestinal corrosion
Immediate Medical Attention: Necessary for inhalation, ingestion, or splashes to eyes and skin
Suitable Extinguishing Media: Dry sand, carbon dioxide, foam designed for chemical fires
Unsuitable Extinguishing Media: Water forms hazardous corrosive fumes and heat
Specific Hazards: Produces hydrogen chloride gas, phosgene in some conditions, and silicon oxides
Protective Equipment: Full protective suit and self-contained breathing apparatus required
Firefighting Instructions: Stay upwind, cool unaffected containers with water spray, evacuate area if uncontained
Explosion Hazard: Containers may explode from heat or physical damage
Personal Precautions: Use full chemical resistant suit, gloves, goggles, respirator with acid gas filter
Evacuation: Clear area, isolate leak or spill, restrict access especially to non-essential personnel
Environmental Precautions: Prevent spread to drains, watercourses, or soil, notify responsible authorities
Methods for Containment: Absorb spillage with dry inert material such as sand, cover pools with vapor suppressant
Methods for Cleanup: Collect material in suitable acid-resistant containers for disposal, ventilate area, decontaminate with solution of sodium carbonate
Precautions for Safe Handling: Carry out operations in well-ventilated fume hood, avoid all personal contact, use non-sparking and anti-static tools
Hygiene Measures: Wash hands, remove contaminated clothing immediately, no eating or drinking in use areas
Storage Conditions: Store tightly sealed in cool, dry, well-ventilated place, separated from moisture, acids, alkalis, oxidizing agents
Container Requirements: Use corrosion-resistant container, adequately labeled
Storage Temperature: Kept under 30°C, avoid freezing or excessive heat
Incompatibilities: Avoid storage near water, oxygen sources, organic peroxides, and strong bases
Occupational Exposure Limits: No ACGIH TLV, but local workplace guidelines and legal standards apply
Engineering Controls: Ventilation required, preferably local exhaust, handle in chemical fume hood
Respiratory Protection: Approved respirators with acid gas cartridge or powered air-purifying respirators
Skin Protection: Chemical resistant gloves, apron, sleeves, non-permeable suit
Eye Protection: Safety goggles plus face shield
Other Protective Measures: Eyewash stations and safety showers near working site, maintain good housekeeping practices
Appearance: Clear to pale yellow liquid
Odor: Sharp, pungent, suffocating
Boiling Point: 108–110°C at 760 mm Hg
Melting Point: -51°C
Vapor Pressure: 38 mm Hg at 20°C
Density: 1.38 g/cm³ at 20°C
Solubility: Reacts violently with water
pH: Corrosive
Flash Point: Not applicable (does not ignite easily but produces toxic gas when burning)
Evaporation Rate: High
Partition Coefficient (n-octanol/water): Not available
Autoignition Temperature: No data
Chemical Stability: Stable under recommended storage conditions away from moisture
Incompatible Materials: Water, alcohols, strong oxidizers, amines, acids, and bases
Hazardous Decomposition Products: Hydrochloric acid fumes, silicon oxides, chlorinated organics
Possibility of Hazardous Reactions: Releases corrosive and toxic gases in contact with water or humid air
Conditions to Avoid: Exposure to atmosphere, heating above recommended levels
Acute Toxicity: Highly toxic by inhalation, ingestion, or skin contact
Skin Corrosion/Irritation: Causes severe burns, tissue destruction
Eye Damage/Irritation: Severe, may cause blindness
Respiratory Sensitization: Not established but high risk of severe irritation
Chronic Effects: Long-term exposure can damage respiratory tract and teeth, possible risk for chronic bronchitis
Carcinogenicity: No data available
Reproductive Toxicity: Not demonstrated in available animal studies
Symptoms: Burning sensation, coughing, shortness of breath, delayed pulmonary edema
Aquatic Toxicity: Toxic to aquatic life, forms hydrochloric acid in water threatening ecosystem pH balance
Persistence and Degradability: Decomposes rapidly in moist air or water, producing persistent chlorinated compounds
Bioaccumulation: Unlikely to bioaccumulate directly but breakdown products may persist
Mobility in Soil: High, reacts with soil moisture producing acidic byproducts
Other Adverse Effects: Alters biological treatment processes if spilled near wastewater plants
Waste Disposal Methods: Must be neutralized and disposed as hazardous chemical waste in compliance with federal, state, and local regulations
Contaminated Packaging: Decontaminate then dispose according to hazardous waste guidelines
Special Instructions: Absorb unwanted material on dry inert substance, package securely, label properly during transit
Do Not Discharge: Avoid entering surface water, ground water, or soil
UN Number: UN 2987
UN Proper Shipping Name: Chloromethyltrichlorosilane
Transport Hazard Class: 6.1 (Toxic substance), 8 (Corrosive)
Packing Group: I (high danger)
Special Precautions: Emergency guides present, avoid moisture exposure during transit, use UN approved containers
Labels Required: Toxic, Corrosive
Marine Pollutant: Yes
OSHA: Listed as hazardous chemical under Hazard Communication Standard
TSCA: Listed in U.S. Toxic Substances Control Act inventory
EPA SARA Title III: Subject to Section 313 reporting for toxic chemicals
EU Information: Classified as a substance of very high concern under REACH
Other Regional Regulations: Compliance required with all relevant country, state, and local regulations
Workplace Labeling: Must include hazard pictograms, precautionary statements, and supplier identification
