Product Name: 3-Chloropropylmethyl Polysiloxane
Synonyms: Chloropropylmethylsiloxane polymer
Recommended Use: Intermediate for silicone rubber, coatings, sealants, surface modifiers
Supplier: Manufacturer and distributor details as per shipping label
Emergency Telephone: Emergency response number provided on shipping documentation and product label
Chemical Formula: (C3H6Cl)(CH3)SiO, repeated in polymer chain
CAS Number: 63148-57-2
GHS Classification: Eye Irritation Category 2A, Skin Irritation Category 2, Specific Target Organ Toxicity (Single Exposure) Category 3
Label Elements: Signal Word: Warning
Hazard Statements: Causes skin irritation, causes serious eye irritation, may cause respiratory irritation
Precautionary Statements: Avoid breathing vapors or mists, wash skin thoroughly after handling, use only outdoors or in a well-ventilated area, wear protective gloves/protective clothing/eye protection/face protection
Other Hazards: May generate hydrogen chloride gas on burning. Vapors can form explosive mixtures with air at elevated temperature.
Chemical Name: 3-Chloropropylmethyl Polysiloxane
Component: 3-Chloropropylmethylsiloxane polymer
Concentration: >90% by weight
Impurities: Trace amounts of cyclic siloxanes & residual 3-Chloropropyltrimethoxysilane (<0.5%)
CAS Number: 63148-57-2
Additional Info: Does not contain intentionally added hazardous fillers or plasticizers by regulatory standards
General Recommendations: Remove victim from exposure. Do not leave affected person unattended. Get medical attention if adverse health effects persist.
Inhalation: Move to fresh air. Support breathing as needed. Get medical help if symptoms occur.
Skin Contact: Remove contaminated clothing and shoes. Rinse skin with soap and water for at least 15 minutes. Seek medical advice if irritation develops.
Eye Contact: Wash eyes immediately with large amounts of water. Hold eyelids apart to flush entire surface. Continue rinsing for several minutes. Remove contact lenses if present and easy to do.
Ingestion: Rinse mouth with water. Do not induce vomiting unless told by a physician. Never give anything by mouth to an unconscious person.
Symptoms and Effects: Skin redness, burning, stinging eyes, cough or throat irritation from vapor. Prolonged exposure may worsen effects.
Note to Physicians: Treat symptomatically.
Suitable Extinguishing Media: Foam, dry chemical, water spray, carbon dioxide
Unsuitable Extinguishing Media: Direct water jet (may spread burning liquid)
Specific Hazards: At high temperatures, may release hydrogen chloride, silicon oxides, carbon monoxide, carbon dioxide. Vapors may ignite if mixed with air.
Protective Equipment: Firefighters should wear self-contained breathing apparatus and full protective clothing.
Fire-Fighting Instructions: Cool containers exposed to flames with water spray. Stay upwind. Take precautions to avoid contact with vapors, fumes, or contaminated water runoff.
Personal Precautions: Restrict access. Wear chemical-resistant gloves, goggles, and suitable protective clothing to prevent skin and eye contact. Provide adequate ventilation. Avoid breathing fumes.
Environmental Precautions: Prevent entry into drains, sewers, surface water, and soil. Notify local environmental authorities as required.
Methods for Containment: Contain spilled material using inert absorbent such as sand, earth, or vermiculite.
Clean-Up Procedures: Collect absorbed product into containers for disposal. Clean contaminated surfaces with suitable detergent and water. Use non-sparking tools. Dispose of residue in accordance with regulations.
Reference to Protection: See Section on Exposure Controls and Personal Protection.
Precautions for Safe Handling: Avoid spills, splashes, and generation of vapor. Do not get in eyes, on skin, or on clothing. Wash hands thoroughly after handling. Remove contaminated clothing and clean before reuse.
Safe Storage Conditions: Store in original, tightly closed container, away from direct sunlight and sources of ignition. Keep in well-ventilated, dry area.
Incompatible Materials: Strong oxidizers, strong acids, strong bases, moisture-sensitive materials.
Particular Use Notes: Store at temperatures between 5°C and 25°C. Avoid handling large quantities in confined spaces. Do not store near food, beverages, or animal feed.
Occupational Exposure Limits: No established exposure limits for this substance. Maintain air concentrations below allowable workplace exposure standards for nuisance particulates.
Engineering Controls: Use local exhaust ventilation or process enclosure to minimize airborne concentrations.
Eye Protection: Splash-proof safety goggles or face shield
Skin Protection: Nitrile or neoprene gloves, chemical-resistant Apron and boots as needed
Respiratory Protection: Use approved respirator with organic vapor cartridge if ventilation is inadequate. Respiratory protection may be needed for cleaning large spills.
Hygienic Measures: Wash exposed skin thoroughly after handling. Do not eat, drink, or smoke in work area.
Appearance: Colorless to yellowish, viscous liquid
Odor: Slight, characteristic
Odor Threshold: Not determined
pH: Not applicable (non-aqueous liquid)
Melting Point/Freezing Point: Below -50°C
Boiling Point/Range: Above 200°C
Flash Point: >100°C (closed cup)
Evaporation Rate: Slow compared to water
Flammability (solid, gas): Not classified as flammable but will burn
Vapor Pressure: <0.5 mmHg @ 25°C
Vapor Density: Not determined
Relative Density: 0.98 to 1.05 (water = 1)
Solubility: Insoluble in water; soluble in organic solvents (toluene, hexane)
Partition Coefficient (n-octanol/water): Not determined
Auto-ignition Temperature: Over 300°C
Decomposition Temperature: Over 250°C
Viscosity: 100 to 20,000 mPa·s (varies by product grade)
Molecular Weight: Variable (polymeric product)
Chemical Stability: Stable under recommended handling and storage conditions.
Possibility of Hazardous Reactions: Reacts with strong oxidizing agents. May liberate HCl under intense heat or open flame.
Conditions to Avoid: Elevated temperatures, open flames, incompatible materials
Incompatible Materials: Strong acids, bases, oxidizers, moisture
Hazardous Decomposition Products: Hydrogen chloride, silicon dioxide, carbon oxides, low molecular weight siloxanes.
Acute Toxicity: No significant acute toxicity expected by inhalation, ingestion, or skin contact based on available data
Skin Corrosion/Irritation: May cause moderate skin irritation
Serious Eye Damage/Irritation: Causes eye irritation
Respiratory Sensitization: Not classified
Skin Sensitization: Not expected to cause skin sensitization
Germ Cell Mutagenicity: Not classified
Carcinogenicity: No components are listed as carcinogenic (IARC, NTP, OSHA)
Reproductive Toxicity: Not recognized as reproductive or developmental toxicant
STOT-Single Exposure: May cause reversible mild respiratory tract irritation
STOT-Repeated Exposure: No known chronic toxicity from repeated exposure
Routes of Exposure: Skin, eyes, inhalation
Symptoms: Irritation, redness, tearing, coughing
Ecotoxicity: Not classified as acutely hazardous to aquatic life
Persistence and Degradability: Expected to degrade slowly; hydrolyzes to silanols and inorganic components in water and soil
Bioaccumulative Potential: Low due to high molecular weight; not expected to bioaccumulate significantly
Mobility in Soil: Low mobility; tends to adsorb to soil particles
Other Adverse Effects: Release into the environment may cause surface film formation and physical fouling of aquatic organisms.
Disposal Methods: Incinerate at approved chemical waste facility. Do not discharge into drains, surface water, or soil or landfill without proper authorization.
Container Disposal: Triple-rinse. Dispose of containers in accordance with local, state, and federal regulations.
Hazardous Waste: Product may be regulated as hazardous waste depending on local rules.
UN Number: Not regulated for transport as hazardous material
UN Proper Shipping Name: Not applicable
Transport Hazard Class: Not classified
Packing Group: Not applicable
Environmental Hazards: Not identified as marine pollutant
Transport in Bulk: Follow local, national, and international transport regulations
Special Precautions: Secure containers tightly. Protect from physical damage, heat, and moisture during transit.
TSCA Inventory: Listed
REACH Status: Polymer exempt or pre-registered under EU REACH
OSHA HazCom: Hazardous per OSHA Hazard Communication Standard
SARA/Title III: Not subject to specific reporting under Sections 302/304/313
WHMIS (Canada): Classified as D2B (Toxic Material Causing Other Toxic Effects)
Other Regulations: Complies with major international chemical safety regulations. Check local, regional, and national guidelines.
