Product Name: N-Hexadecylmethyldichlorosilane
Chemical Formula: C17H36Cl2Si
Synonyms: Dichloro(methyl)hexadecylsilane
Recommended Use: Surface treatment agent, coupling agent in advanced chemical syntheses, hydrophobic coatings for laboratory glassware and scientific equipment
Supplier: [Enter supplier contact details]
Emergency Phone: [Enter emergency phone line]
CAS Number: 18719-76-1
Classification: Corrosive to skin and eyes, irritating to respiratory tract, hazardous to aquatic environments
GHS Label Elements: Danger symbol (Corrosive, Irritant)
Signal Word: Danger
Hazard Statements: Causes severe burns to skin and eyes, produces harmful fumes that may irritate throat and lungs if inhaled, harmful if swallowed, possible lung injury from inhalation of vapors
Precautionary Statements: Use protective gear, avoid breathing vapors or aerosols, do not handle without proper training, wash exposed skin thoroughly after contact, store away from water sources
Main Ingredient: N-Hexadecylmethyldichlorosilane Concentration: >95%
Impurities/Other Components: Chlorosilanes (trace amounts), hydrocarbons (negligible amounts), no identified carcinogens present
Inhalation: Move person to fresh air immediately, keep calm, administer artificial respiration if breathing stops, seek medical attention promptly
Skin Contact: Rinse affected area under running water for at least 15-20 minutes, remove contaminated clothing and shoes, do not delay medical examination
Eye Contact: Rinse eyes with a continuous gentle stream of water for at least 15-20 minutes, hold eyelids open, consult an ophthalmologist right away
Ingestion: Rinse mouth thoroughly, do not induce vomiting, drink plenty of water if person is conscious, seek hospital care as soon as possible
Indications for Immediate Medical Attention: Chemical burns, difficulty breathing, persistent irritation, delayed lung injury
Suitable Extinguishing Media: Dry chemical powder, carbon dioxide (CO2), foam
Unsuitable Media: Water (may react to produce hydrogen chloride and flammable gases)
Special Hazards: Releases hydrochloric acid, silicon oxides, and combustible vapors under fire conditions
Protective Equipment: Self-contained breathing apparatus, full protective fire gear
Specific Firefighting Methods: Contain runoff, avoid contact with water while extinguishing, approach from upwind to avoid toxic gases, cool containers with dry methods
Personal Precautions: Wear chemical splash goggles, gloves, lab coat, and appropriate respirator, keep unprotected persons away from spill area
Environmental Precautions: Prevent entry into drains, sewers, or rivers, contain spillage with inert absorbent like dry sand or earth
Cleanup Methods: Scoop up using non-sparking tools, absorb residue with sand or suitable absorbent, place in labeled chemical waste container, ventilate affected area thoroughly, wash down contaminated surfaces avoiding water contact with chemical
Emergency Procedures: Notify local authorities if large quantities enter water or soil, evacuate non-essential personnel
Safe Handling Recommendations: Work in well-ventilated chemical fume hood, do not breathe vapors, avoid direct contact with material, keep containers tightly closed
Hygiene Practices: Wash hands and forearms after handling, restrict eating/drinking/smoking in work areas, decontaminate protective gear before reuse
Storage Conditions: Store in dry, cool, corrosion-resistant area away from incompatible substances, including water, alcohols, strong bases and oxidizers, protect from sunlight and moisture, use secondary containment
Incompatibles: Strong acids, water, alcohols, oxidizing agents, bases
Exposure Limits: No established occupational exposure limits for this substance, limit exposure as low as reasonably achievable
Ventilation: Local exhaust recommended, maintain low concentration vapors in workplace
Personal Protection: Chemical-resistant gloves (nitrile or neoprene), splash-proof goggles or face shield, lab coat or apron, closed-toe shoes, respiratory protection (half-mask with acid gas cartridge or supplied air system for large spills)
Engineering Controls: Eyewash station and emergency safety shower in immediate work area, chemical-resistant countertops and flooring material
Appearance: Clear, colorless to pale yellow liquid
Odor: Slight chlorine odor, may be irritating to nose
Molecular Weight: 339.47 g/mol
Boiling Point: Approx. 134 °C at 0.7 mmHg
Melting Point: Not precisely established; substance remains liquid at room temperature
Solubility: Reacts violently with water, insoluble in water, soluble in organic solvents (chloroform, toluene, hexane)
Vapor Pressure: Low at 20°C
Density: About 0.90 – 0.93 g/cm3 at 20°C
pH: Not applicable (undergoes hydrolysis in water)
Flash Point: >80°C (closed cup)
Chemical Stability: Stable under recommended storage conditions, decomposes in presence of moisture
Reactivity: Vigorous reaction with water generating HCl gas, reacts with alcohols, amines, and strong oxidizing agents
Conditions to Avoid: Contact with moisture, exposure to air, direct sunlight, contamination with incompatible materials
Decomposition Products: Hydrogen chloride, methyl hexadecyl silanols, silicon oxides
Acute Toxicity: Harmful if swallowed or inhaled, causes severe tissue burns to oral, nasal, and respiratory passages
Skin Corrosion/Irritation: Causes deep burns and blisters on contact, possible delayed onset of symptoms
Eye Damage/Irritation: Immediate pain, redness, possible tissue destruction, risk of permanent damage or loss of vision
Respiratory Sensitization: Prolonged exposure can result in respiratory irritation or chemical pneumonitis
Carcinogenicity, Mutagenicity, Reproductive Effects: No data available; not classified as carcinogenic by major agencies
Long-Term Effects: Scar tissue formation, persistent respiratory or skin issues after acute exposure
Acute Aquatic Toxicity: Toxic to aquatic organisms, may cause long-lasting effects in aquatic environments
Persistence and Degradability: Undergoes slow hydrolysis in soil and waterways, resulting byproducts may accumulate
Bioaccumulation: Low potential for bioaccumulation in animal tissues
Mobility: Strongly adsorbed to soil, low movement through groundwater if uncontaminated by spill
Avoid Release: Do not allow entry to drains, soil, surface water or groundwater, notify environmental authorities in event of accidental large release
Waste Disposal: Collect liquid and absorbent in sealed, labeled chemical waste containers, store safely until disposal through licensed hazardous waste contractor
Disposal Methods: Preferred incineration in a chemical incinerator equipped to handle halogenated waste, accompanied by scrubbing system for gases
Contaminated Packaging: Rinse thoroughly with compatible solvent, collect all rinsate as hazardous waste, dispose in accordance with federal and local regulations
Regulatory Compliance: Dispose subject to hazardous waste regulations, never release into sewers or natural water sources
UN Number: 1760
Proper Shipping Name: Corrosive liquids, n.o.s. (contains n-hexadecylmethyldichlorosilane)
Hazard Class: 8 (Corrosive)
Packing Group: II
Labels: Corrosive
Special Transport Precautions: Keep containers upright and secured, segregate from incompatible goods during transport, protect containers from moisture and rough handling, consult all local and international shipping regulations before consignment
Chemical Inventories: Listed on relevant chemical substance inventory lists in major jurisdictions if imported or produced in significant quantity
OSHA Hazards: Classified as corrosive, needs hazard communication standards compliance
SARA Title III: Not listed as extremely hazardous, not subject to specific threshold reporting
DSL/NDSL (Canada): Consult local regulations for status
EU Classification: Corrosive (C), Hazard Symbols: C
Other Regulations: Product falls within local, regional, and global workplace safety acts; proper labeling, storage, and employee training required
Safety Assessment: Facilities working with this product follow strict control, monitoring, and emergency response plans, updated in accordance with legal and industry standards
