Product Name: N-Dodecylmethyldiethoxysilane
CAS Number: 4196-86-5
Recommended Use: Surface treatment, silane coupling agent, water-repellent additive, chemical intermediate, laboratory reagent
Manufacturer/Supplier: Data available upon request
Contact Information: Emergency phone and technical support available via supplier
Synonyms: Dodecylmethyldiethoxysilane, 1-(Dodecyl) methyldiethoxysilane
Molecular Formula: C17H38O2Si
Molecular Weight: 302.57 g/mol
GHS Classification: Flammable liquids (Category 3), Skin irritation (Category 2), Eye irritation (Category 2A), Acute aquatic toxicity (Category 3)
Signal Word: Warning
Hazard Statements: Flammable liquid and vapor; Causes skin and eye irritation; Harmful to aquatic life
Pictograms: Flame, exclamation mark, environment (for aquatic hazard)
Precautionary Statements: Keep away from heat, sparks, open flames, hot surfaces; Use personal protective equipment; Avoid release into environment; Wash contaminated skin thoroughly
Potential Health Effects: Direct contact may cause redness, swelling, or pain on skin and eyes; inhalation of vapors may cause dizziness or headache; ingestion can cause nausea or stomach discomfort
Other Hazards: Vapor can form explosive mixtures with air; spills can make surfaces slippery
Chemical Name: N-Dodecylmethyldiethoxysilane
CAS Number: 4196-86-5
Concentration: ≥98%, impurities <2%
Other Components: No hazardous impurities present at concentrations requiring disclosure
Stabilizers/Additives: None known
Mixture or Substance: Substance
Inhalation: Move affected individual to fresh air, keep at rest in a comfortable position, seek medical advice if symptoms persist or worsen
Skin contact: Remove contaminated clothing and shoes, wash skin immediately with soap and water for several minutes, seek medical attention for persistent irritation
Eye contact: Rinse gently with water for at least 15 minutes, lift eyelids to ensure thorough rinsing, get medical attention if irritation continues
Ingestion: Do not induce vomiting, rinse mouth with water, drink water to dilute, seek medical help immediately
Notes for Physicians: Treat symptomatically, monitor respiratory and cardiovascular functions, ensure supportive care
Suitable Extinguishing Media: Dry chemical powder, carbon dioxide, alcohol-resistant foam, water spray (do not use direct stream)
Special Hazards: Vapor may form explosive mixtures with air, combustion produces silicon oxides, carbon monoxide, carbon dioxide
Protective Equipment: Wear self-contained breathing apparatus and protective clothing
Firefighting Instructions: Isolate area, remove containers from fire area if possible, cool containers with water from a safe distance, avoid inhaling fumes, keep run-off water out of sewers
Explosion Data: Vapors can travel to ignition source and flash back; containers may burst due to heat
Personal Protection: Use suitable protective gloves, goggles, and protective clothing; avoid breathing vapors or contact with skin and eyes; ensure adequate ventilation
Spill Cleanup: Absorb spill with inert material (sand, earth, vermiculite), collect into appropriate containers for disposal, clean area with detergent, ventilate area
Environmental Precautions: Prevent entry into drains, sewers, waterways, and soil
Disposal of Waste: Dispose as hazardous waste in accordance with local regulations; contaminated material treated as chemical waste
Safe Handling Procedures: Avoid spills and vapor generation, use only in well-ventilated areas, keep container tightly closed, ground and bond containers during liquid transfer, use spark-proof tools, avoid sources of ignition
Storage Conditions: Store in a cool, dry, well-ventilated, flame-proof area, keep away from heat and direct sunlight, store in original containers or compatible materials
Incompatible Materials: Strong oxidizers, acids, strong bases, water/moisture (slow hydrolysis over time)
Storage Life: Stability decreases with prolonged storage, use within recommended shelf life person the manufacturer
Control Parameters: No established occupational exposure limits; minimize exposure where possible
Engineering Controls: Local exhaust ventilation, safety shower and eyewash, use explosion-proof equipment in hazardous areas
Personal Protective Equipment: Gloves (nitrile or neoprene), chemical splash goggles, protective clothing, vapor respirator for insufficient ventilation
Hygiene Measures: Wash hands before breaks and at end of work; do not eat, drink, or smoke while handling
Environmental Exposure Controls: Minimize release into environment, use closed systems where feasible
Physical State: Liquid
Color: Colorless to pale yellow
Odor: Faint aromatic, hydrocarbon-like
Odor Threshold: Not determined
Melting Point: Below -20°C
Boiling Point: Approx. 325°C
Flash Point: Approx. 100°C (closed cup)
Evaporation Rate: Not measured
Flammability (solid, gas): Not applicable
Vapor Pressure: Low at 20°C (estimated below 0.1 mm Hg)
Vapor Density: Not determined
Density: 0.85-0.88 g/cm³ at 25°C
Solubility in Water: Immiscible; decomposes slowly
Partition Coefficient (n-octanol/water): Not determined (expected high, lipophilic)
Auto-ignition Temperature: Not established
Decomposition Temperature: Not specified
Viscosity: About 7-12 mPa·s at 25°C
Chemical Stability: Chemically stable under standard conditions; reacts slowly with water
Reactivity: Reacts with moisture to form ethanol and silanols, which may condense and form gels
Conditions to Avoid: Heat, flames, spark, static discharge, high temperature, exposure to moisture
Incompatible Materials: Water, strong oxidizers, strong acids, strong bases
Hazardous Decomposition: Silanol and ethanol on hydrolysis; carbon oxides and silicon oxides under fire
Hazardous Polymerization: Not expected under normal conditions
Likely Routes of Exposure: Inhalation, skin contact, eye contact, ingestion
Acute Toxicity: Oral LD50 (rat): >2000 mg/kg; Dermal LD50 (rabbit): >2000 mg/kg; low acute toxicity
Chronic Effects: Prolonged exposure may cause defatting and irritation of skin, repeated contact may cause dryness or cracking
Skin and Eye Irritation: Causes mild skin irritation and moderate eye irritation based on structural analogs
Respiratory Sensitization: No data, expected to be low based on composition
Carcinogenicity: Not classified as carcinogen by NTP, IARC, OSHA
Mutagenicity: No data showing mutagenic effects
Reproductive Effects: No data available for reproductive toxicity
Symptoms: Irritation, headache, dizziness on exposure to high vapor concentrations
Toxicity to Aquatic Life: Harmful to aquatic organisms, may cause long-term adverse effects
Persistence and Degradability: Hydrolysis in water forms silanols and ethanol, which are more biodegradable than parent compound; parent compound is not readily biodegradable
Bioaccumulative Potential: Based on structure, potential to bioaccumulate in aquatic organisms is significant
Mobility in Soil: Low mobility due to hydrophobic nature, strongly binds to organic matter
Other Adverse Effects: May produce surface films harmful to aquatic plants and animals, avoid release to water bodies
Waste Treatment Methods: Dispose chemical wastes according to local, regional, national and international regulations; incineration preferred where feasible; do not allow into sewers or natural waterways
Contaminated Packaging: Empty containers retain residues; treat as hazardous waste; triple rinse and send to licensed facility
Special Precautions: Avoid discharge to environment, minimize generation of waste
EU Waste Code: 07 02 08 or per local regulations for organosilicon compounds
UN Number: UN 1993
UN Proper Shipping Name: Flammable Liquid, N.O.S. (contains N-Dodecylmethyldiethoxysilane)
Transport Hazard Class: 3 (Flammable liquid)
Packing Group: III
Labels Required: Flammable liquid
Special Precautions for Transport: Do not transport with oxidizers, acids, or in unapproved packaging; keep away from heat, use spill containment for bulk shipments
Marine Pollutant: Not classified for marine transport, but take care due to potential aquatic harm
Chemical Inventory Listings: Listed on TSCA (US), EINECS (EU), DSL (Canada), AICS (Australia), ENCS (Japan), KECI (Korea), PICCS (Philippines), IECSC (China)
Safety, Health and Environmental Regulations: OSHA hazardous chemical (US), subject to SARA reporting as flammable liquid
Labeling Requirements: Comply with GHS; hazard statements, signal word, pictograms required
Restrictions: Professional use only in some jurisdictions, consult national regulations before use
Other Regulatory Considerations: Local workplace exposure controls may apply, state or province restrictions possible, check waste disposal, emissions, and transportation rules for updates
