Product Name: 3-Chloropropyldichloromethylsilane
Chemical Formula: C4H9Cl3Si
CAS Number: 13548-38-4
Synonyms: Methyl(dichloro)(3-chloropropyl)silane
Recommended Use: Intermediate in silicone synthesis, specialty chemical manufacturing
Supplier: Industrial chemical vendors, specialty reagent suppliers
Emergency Contact: Refer to national poison control numbers and company-specific hotlines
GHS Classification: Flammable liquids (Category 3), Skin corrosion (Category 1B), Acute toxicity oral (Category 4), Acute toxicity inhalation (Category 3), Acute toxicity dermal (Category 4), Eye damage (Category 1)
Signal Word: Danger
Hazard Statements: Causes severe skin burns and eye damage; Harmful if swallowed, inhaled, or absorbed through skin; Flammable liquid and vapor
Pictograms: Corrosive, Flammable, Health hazard
Precautionary Statements: Wear protective gloves, clothing, and eye protection; Avoid breathing mist or vapor; Keep away from heat or open flames
Routes of Exposure: Inhalation, skin absorption, ingestion, eye contact
Symptoms: Burning sensation, coughing or breathing discomfort, redness or blisters on skin
Chemical Name: 3-Chloropropyldichloromethylsilane
Concentration: 96–100% by weight
CAS Number: 13548-38-4
Impurities: May contain trace unsaturated silanes or reaction byproducts under 2%
Molecular Weight: 205.57 g/mol
Other Ingredients: None reported
Eye Contact: Rinse continuously with water for at least 15 minutes, hold eyelids apart, remove contact lenses if present, seek immediate medical attention
Skin Contact: Remove contaminated clothing, wash exposed area thoroughly with soap and water, seek medical help for burns or persistent irritation
Inhalation: Move to fresh air, keep person warm and comfortable, administer oxygen if breathing is labored, provide mouth-to-mouth resuscitation if needed, get prompt medical attention
Ingestion: Rinse mouth, do not induce vomiting unless directed by medical staff, drink water to dilute chemical, seek immediate professional help
Most Important Symptoms: Severe burns, irritation, respiratory distress, delayed lung injury
Suitable Extinguishing Media: Carbon dioxide, dry chemical powder, foam, alcohol-resistant foam
Unsuitable Extinguishing Media: Direct water jet due to potential chemical reaction and spattering
Specific Hazards: Releases toxic and corrosive hydrogen chloride, phosgene, or silicon oxides when burned; steam and combustion gases can be hazardous
Protective Equipment: Full self-contained breathing apparatus, chemical-resistant gear, gloves, boots
Special Precautions: Cool containers with flooding quantities of water from a safe distance. Shut off source if safe to do so. Burning liquid may float on water, spreading the risk
Explosion Sensitivity: May form explosive vapor-air mixtures at high temperatures
Personal Precautions: Evacuate area, restrict access, ventilate space, avoid contact with liquid and vapors, do not breathe fumes
Protective Equipment: Chemical splash goggles, neoprene gloves, full suit, respiratory protection (SCBA for large spills)
Environmental Precautions: Prevent run-off into drains, surface water, or soil. Alert authorities if chemical enters environment
Containment Methods: Dike spill with inert materials (sand, earth), absorb spill with noncombustible absorbent, collect in corrosion-resistant containers
Cleanup Procedures: Neutralize residue with dilute caustic soda, scoop up, dispose per guidelines, decontaminate area with plenty of water
Handling: Work in chemical fume hood or well-ventilated area, use proper PPE, avoid sources of ignition, do not eat, drink, or smoke during use, ground and bond containers when transferring
Storage: Store in tightly closed containers made of compatible, corrosion-resistant materials; keep in cool, dry, well-ventilated place, separated from strong oxidizers, water, and foodstuffs
Other Precautions: Label containers clearly, restrict access to qualified personnel, ensure spill containment measures are in place
Occupational Exposure Limits: No established US OSHA/ACGIH TLVs; follow manufacturer or local guidelines
Engineering Controls: Use explosion-proof ventilation, local exhaust, eye wash facilities, and safety showers
Personal Protective Equipment: Full protective suit, chemical-resistant gloves (butyl, neoprene), safety goggles or face shield, impervious shoes, approved respirator where exposure exceeds limits
Hygiene Measures: Wash thoroughly after handling, remove contaminated clothing, avoid contact with skin, eyes, and clothes
Monitoring: Continuous air monitoring recommended in large-scale settings
Appearance: Colorless to pale yellow liquid
Odor: Sharp, acrid, unpleasant
Odor Threshold: Not available
Melting Point: -81 °C
Boiling Point: 138 °C at 760 mmHg
Flash Point: 36 °C (closed cup)
Evaporation Rate: Not determined
Flammability: Flammable liquid
Vapor Pressure: 10 mmHg at 25 °C
Vapor Density: >1 (air = 1)
Density: 1.22 g/cm³ at 25 °C
Solubility: Reacts violently with water
Partition Coefficient (log Kow): Not determined
Auto-ignition Temperature: 385 °C
Decomposition Temperature: Releases toxic fumes above 150 °C
Viscosity: Low, mobile liquid
Chemical Stability: Sensitive to moisture and water, stable in sealed, dry containers under normal temperatures
Possible Hazardous Reactions: Reacts exothermically with water, strong bases; generates hydrogen chloride and silanols
Conditions to Avoid: Humidity, water, heat, open flame, static discharge, incompatible substances
Incompatible Materials: Water, strong oxidizers, strong acids, alcohols, amines
Hazardous Decomposition Products: Hydrogen chloride, chlorinated organics, silicon oxides, phosgene (in fire)
Acute Toxicity: LD50 (oral, rat): 489 mg/kg. LD50 (dermal, rabbit): 950 mg/kg. LC50 (inhalation, rat, 4h): 17 ppm
Skin Corrosion/Irritation: Causes severe burns
Eye Damage/Irritation: Serious risk of irreversible eye injury
Respiratory Sensitization: Causes respiratory tract irritation
Carcinogenicity: No data available for this compound as classified by IARC, NTP, or OSHA
Mutagenicity: No current evidence of mutagenicity
Other Chronic Effects: Prolonged or repeated exposure can cause dermatitis or permanent lung injury
Signs and Symptoms: Burning pain, blistering, cough, nasal inflammation
Aquatic Toxicity: Expected to be harmful to aquatic life by local exposure through hydrolysis and release of toxic products
Persistence and Degradability: Hydrolyzes in water forming silanols and hydrochloric acid, which are biodegradable but can alter pH
Bioaccumulation Potential: Low, due to rapid hydrolysis
Mobility in Soil: Limited by hydrolysis; may contaminate ground water if spilled in large quantities
Other Adverse Effects: Acidification and silica release in environmental compartments
Disposal Methods: Handle as hazardous waste; incinerate under controlled conditions or dispose of in chemical landfill approved for halogenated organics
Contaminated Packaging: Triple rinse, puncture, and dispose of as hazardous waste if not reusable
Precautions: Do not discharge into environment, protect from moisture during storage and transport, comply with local, regional, and national regulations
Recommended Recovery: Consult licensed waste disposal company experienced with silicon and chlorinated waste streams
UN Number: UN 2987
UN Proper Shipping Name: 3-Chloropropyldichloromethylsilane
Transport Hazard Classes: 6.1 (Toxic substances), 8 (Corrosive), 3 (Flammable liquids)
Packing Group: I (high danger)
Special Precautions: Keep upright, segregate from food and incompatible cargo, emergency response guide available during shipment
Environmental Hazards: Classified as a marine pollutant
US TSCA: Listed on the Toxic Substances Control Act Inventory
EU REACH: Registration required; may be subject to restrictions for certain uses
OSHA Standard: Considered hazardous based on corrosivity, flammability, and toxicity
Hazard Symbols (GHS): Skull and crossbones, corrosive, exclamation mark
SARA Title III: Subject to reporting requirements for acute health hazard
State Regulations: Review California Proposition 65 and similar state lists for updates; typically covered under general hazardous chemical statutes
Other International Regulations: Complies with classification and labeling rules in Canada (WHMIS), Australia, Japan, and under United Nations transport recommendations
