Product Name: Chloromethyl(Dimethyl)Methoxysilane
Chemical Formula: C4H11ClOSi
CAS Number: 2212-10-4
Synonyms: (Chloromethyl)dimethylmethoxysilane
Recommended Use: Intermediates, silicone synthesis, specialty chemical manufacturing
Manufacturer: List actual supplier name and address as appropriate
Emergency Phone: Specify according to supplier details or local poison center
Relevant Identified Uses: Industrial, laboratory research applications only
Classification: Flammable liquid, skin irritant, eye damage, specific target organ toxicity
Hazard Statements: Causes severe skin burns and eye damage, highly flammable liquid and vapor, toxic if inhaled, may cause respiratory irritation
GHS Label Elements: Signal word: Danger; Hazard pictograms: flame, exclamation mark, corrosive
Routes of Exposure: Skin, eyes, inhalation, ingestion
Physical Hazards: May ignite at room temperature, releases toxic gases on contact with water
Environmental Hazards: Harmful to aquatic organisms with long-lasting effects
Chemical Name: (Chloromethyl)dimethylmethoxysilane
CAS Number: 2212-10-4
Purity: Greater than 97%
Impurities: Common trace organosilicon derivatives, chlorinated compounds, moisture reactants trace
Additives: None detected above reporting threshold
Other Components: No stabilizers or solvents intentionally present
Inhalation: Move affected person to fresh air, keep at rest, call a doctor, give oxygen if breathing is difficult, seek immediate medical help
Skin Contact: Remove all contaminated clothing, rinse skin with plenty of running water for at least 15 minutes, seek immediate medical attention, launder clothing before reuse
Eye Contact: Flush eyes with water for no less than 15 minutes, keep eyelids open, remove contact lenses if worn and easy to do, get medical help quickly
Ingestion: Rinse mouth thoroughly, do not induce vomiting, never give anything by mouth to an unconscious person, get urgent medical help
Notes to Physician: Treat symptomatically, monitor for chemical pneumonitis, pulmonary edema
Suitable Extinguishing Media: Dry chemical powder, carbon dioxide, alcohol-resistant foam
Unsuitable Extinguishing Media: Water jet may scatter flammable liquid causing spread of fire
Specific Hazards in Fire: Releases hydrogen chloride, phosgene, silicon oxides on combustion; vapors may form explosive mixtures with air; container may explode in heat
Protective Equipment for Firefighters: Wear self-contained breathing apparatus and fully protective anti-chemical clothing
Special Procedures: Isolate hazard area, cool containers with water spray from a safe distance, stay away from sealed containers exposed to fire
Explosion Data: Vapors may travel to ignition source and flash back, sensitive to static discharge
Personal Precautions: Evacuate area, ventilate, avoid all contact with skin, eyes, breathing vapors; use full protective gear including NIOSH-approved respirator
Environmental Precautions: Prevent from entering sewers, drains, soil or waterways; notify environmental authorities immediately
Containment Methods: Dike spill with inert absorbent, collect for disposal in clearly labeled, sealed containers
Cleanup Procedures: Absorb with sand, earth, or dry lime; neutralize residues; decontaminate area with compatible detergent; ventilate affected zone before reuse
Decontamination: Dispose of any contaminated absorbent as hazardous waste in accordance with local regulations
Special Instructions: If safe, stop leak; avoid all sources of ignition
Safe Handling: Work in fume hood or well-ventilated area, avoid all bodily contact, prevent inhalation of vapors, keep containers tightly closed, use non-sparking tools, ground and bond all transfer containers, open drums carefully
Storage Conditions: Keep in original, tightly sealed container away from sources of ignition, heat, direct sunlight, acids, moisture, oxidizing agents; store in cool, dry, dedicated chemical area with explosion-proof ventilation
Packaging Materials: Use compatible, corrosion-resistant containers; avoid glass and ordinary plastics
Incompatible Materials: Strong acids, bases, moisture, oxidizers, water, amines, alcohols
Fire Protection: Install automatic fire suppression, keep fire extinguishers easily accessible
Occupational Exposure Limits: No specific OSHA or ACGIH TLVs, recommend workplace monitoring for chlorinated organic vapors, consult local authorities
Engineering Controls: Local exhaust, mechanical ventilation, splash controls, improper vapor buildup alarms
Personal Protection Equipment: Chemical-resistant gloves (butyl rubber or equivalent), splash goggles, face shield, flame-resistant lab coat, long pants, closed shoes, respirators rated for organic vapors and acid gases
Hygiene Measures: Do not eat, drink, or smoke during use; wash hands, face, and exposed skin thoroughly after handling; remove contaminated clothing immediately
Appearance: Colorless to pale yellow transparent liquid
Odor: Sharp, acrid
Odor Threshold: Not established
Boiling Point: 73 – 75 °C (163 – 167 °F)
Melting Point: Not determined
Vapor Pressure: 40 mmHg at 20 °C
Vapor Density: Heavier than air
pH: Not applicable
Density: 0.995 g/cm³
Water Solubility: Reacts violently with water
Partition Coefficient (Log Kow): Not measured
Flash Point: 9 °C (48 °F) closed cup
Auto-ignition Temperature: 230 °C (446 °F)
Evaporation Rate: Fast
Viscosity: Low, mobile liquid
Decomposition Temperature: Data not available
Chemical Stability: Stable under dry, recommended storage conditions but reacts violently with water
Reactivity: Highly reactive with strong acids, bases, water, oxidizing agents
Hazardous Reactions: May generate toxic, corrosive gases (HCl, phosgene, methanol, formaldehyde) upon contact with water or hydrolysis
Incompatible Materials: Moisture, oxidizers, acids, bases, amines
Hazardous Decomposition Products: Hydrogen chloride, silicon oxides, formaldehyde, faint traces of phosgene
Polymerization: No dangerous polymerization expected under normal conditions
Likely Routes of Exposure: Inhalation, dermal, ocular, ingestion
Acute Toxicity: Inhalation causes throat, lung, nose irritation; skin contact produces burns, rapid pain or blistering, rapid tissue damage; ingestion damages mouth, esophagus, stomach
Effects on Eyes: Severe irritation, burns, vision impairment possible
Chronic Effects: Prolonged exposure may lead to dermatitis, respiratory system sensitization, scarring, decreased pulmonary function
Carcinogenicity: Not listed by IARC, NTP, OSHA
Mutagenicity: Animal and in vitro studies limited, not fully tested
Reproductive Toxicity: No specific data available
Target Organs: Skin, eyes, respiratory system
Symptoms: Pain, coughing, wheezing, eye redness, stomach upset, chemical burns, delayed pulmonary edema possible
Ecotoxicity: Harmful to aquatic plants and animals, especially in high concentrations or with chronic exposure
Persistence and Degradability: Not rapidly biodegradable; hydrolyzes to more persistent and toxic products in water (including HCl, methanol)
Bioaccumulative Potential: No specific data; low expected based on structure
Mobility in Soil: Rapid hydrolysis in moist soil or water; potential to migrate in dry conditions
Other Adverse Effects: Toxic byproducts may impact aquatic habitats
Precaution: Do not release uncontrolled to environment
Waste Disposal Methods: Treat as hazardous waste under RCRA; burn in approved chemical incinerator equipped with afterburner and scrubber
Container Disposal: Triple rinse empty containers before recycling or disposal, puncture so they cannot be reused
Precautions: Avoid contact between waste and water, acids, bases, oxidizing materials
Disposal of Spilled Material: Use approved container, label clearly; consult local regulations for transport and facility acceptance
Do Not: Flush to sewer or land; avoid vapor generation during transfer
UN Number: UN 2924
UN Proper Shipping Name: Flammable Liquid, Corrosive, N.O.S. (Chloromethyl(Dimethyl)Methoxysilane)
Transport Hazard Class: 3 (Flammable liquid), 8 (Corrosive)
Packing Group: II
Label Requirements: Flammable liquid, corrosive
Marine Pollutant: Yes
Special Precautions: Ensure all containers tightly sealed, protected from mechanical shock, store in upright position, transport in compliance with local and international regulations
Emergency Response Guide: Reference Guide 132 for spills, leaks, fires
OSHA: Covered under Hazard Communication Standard, subject to workplace labeling and training
TSCA: Listed in the TSCA inventory
SARA: SARA 302/304 extremely hazardous, SARA 313 subject to reporting if manufacturing, processing, or otherwise using more than the de minimis threshold
EPA: RCRA hazardous waste, Clean Air Act Section 112 regulated if accidently released
State Regulations: Subject to reporting in California Proposition 65 for possible byproducts (formaldehyde, methanol)
Other International Regulations: REACH registration in EU required; listed by most major chemical control lists
