Product Name: N-[3-(Trimethoxysilyl)Propyl]Aniline
Chemical Formula: C12H21NO3Si
Synonyms: 3-(Trimethoxysilyl)propylaniline, Silane coupling agent, Silquest A-1120
CAS Number: 3068-76-6
Recommended Use: Adhesion promoter for paints, coatings, sealants, rubber, and plastic industries.
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Classification: Acute Toxicity (Oral, Dermal, Inhalation), Skin Corrosion/Irritation, Eye Damage/Irritation, Respiratory and Skin Sensitization
Hazard Statements: Harmful if inhaled, causes skin and serious eye irritation, may cause respiratory irritation. May cause allergic skin reactions. Vapors can form explosive mixtures with air.
Pictograms: Exclamation Mark, Corrosion
Signal Word: Warning
Precautionary Statements: Avoid breathing mists or vapors. Use proper ventilation. Wear protective gloves, clothing, and eye/face protection. Wash hands after handling.
Hazard Overview: Eye and skin contact with the liquid may lead to irritation, redness, and pain. Prolonged or repeated exposure can lead to dermatitis. Inhalation of high concentrations can result in respiratory tract irritation, headaches, or dizziness.
Chemical Name: N-[3-(Trimethoxysilyl)Propyl]Aniline
Common Names: 3-(Trimethoxysilyl)propylaniline, Silane A-1120
Concentration: ≥98%
Impurities: Methanol (trace, by hydrolysis), aniline (trace, by decomposition)
Molecular Weight: 255.38 g/mol
Inhalation: Move person out of exposure to fresh air. Keep at rest. Seek medical attention for breathing difficulties.
Skin Contact: Remove contaminated clothing. Wash with plenty of water and soap for at least 15 minutes. If irritation or rash occurs, consult a physician.
Eye Contact: Rinse eyes for several minutes under running water, lifting eyelids occasionally. Remove contact lenses. Get immediate medical help for irritation or pain.
Ingestion: Do not induce vomiting. Rinse mouth thoroughly with water. Call a poison center or physician for advice.
Most Important Symptoms: Vapors and liquid cause burns, eye damage, and local skin inflammation. Sensitization may develop after repeated exposure.
Suitable Extinguishing Media: Carbon dioxide, dry powder, alcohol-resistant foam, water fog (avoid direct water stream).
Unsuitable Extinguishing Media: Direct water jet as it may scatter and spread fire.
Hazardous Combustion Products: Carbon oxides, nitrogen oxides, silicon oxides, formaldehyde, and toxic fumes.
Special Protective Equipment: Wear self-contained breathing apparatus and full protective gear.
Fire Hazards: Forms flammable vapors which can ignite above 100°C. Leaks and spills increase fire risk—keep containers cool with water.
Advice for Firefighters: Move containers from fire area if safe. Cool exposed drums with water spray. Vent poorly ventilated areas.
Personal Precautions: Evacuate area of unprotected personnel. Wear chemical goggles, gloves, suitable clothing, and a respirator.
Environmental Precautions: Prevent entry into drains, waterways, or soil. Notify authorities in the event of significant spills.
Spill Containment: Isolate hazard area. Dike and absorb with inert material (sand, earth).
Cleanup Methods: Collect in labeled drums for proper disposal. Wash area with water and detergent. Decontaminate tools and equipment.
Ventilation: Provide adequate ventilation during and after cleanup.
Handling: Use only in well-ventilated areas. Keep away from ignition sources, heat, or sparks. Avoid inhalation, ingestion, and contact with eyes or skin. Do not eat, drink, or smoke while handling. Minimize splashing and aerosol formation.
Storage: Store in tightly closed original containers. Keep in a cool, dry, well-ventilated facility away from incompatible substances such as oxidizing agents, strong acids, and moisture. Keep away from light and heat. Store below 30°C.
Packing Materials: Use corrosion-resistant containers. Avoid glass if possible due to the risk of etching or clouding.
Occupational Exposure Limits: No specific OSHA/NIOSH limit for this product. Observe limits for methanol (200 ppm TWA, ACGIH).
Engineering Controls: Provide local exhaust ventilation at processing stations. Use explosion-proof electrical equipment.
Personal Protective Equipment:
State: Liquid
Appearance: Clear to pale yellow
Odor: Weak amine-like
pH: Not applicable (hydrolyzes in contact with moisture)
Boiling Point: 148°C (298°F) at 15 mmHg
Melting Point: Not specified; expected to remain liquid under normal storage
Flash Point: 110°C (230°F) (closed cup)
Flammability: Flammable in the presence of heat or flame
Vapor Pressure: <1 mmHg at 25°C
Vapor Density: Heavier than air
Solubility: Reacts slowly with water to form silanols; sparingly soluble in organic solvents
Density: Approximately 1.05 g/cm³ at 25°C
Partition Coefficient (log Kow): Approx. 1.6
Viscosity: Not measured.
Chemical Stability: Stable under specified storage conditions, but hydrolyzes in moisture to form methanol.
Reactivity: Reacts with water, strong acids, and bases.
Possibility of Hazardous Reactions: Exothermic hydrolysis generates methanol and silanols.
Incompatible Materials: Water, oxidizing agents, strong acids and bases, alcohols.
Hazardous Decomposition Products: Methanol, silicon oxides, aniline, formaldehyde, nitrogen oxides.
Conditions to Avoid: Moisture, heat, direct sunlight, ignition sources.
Acute Toxicity: Harmful if inhaled, ingested, or absorbed through skin. LD50 (oral, rat): 2100 mg/kg. LD50 (dermal, rabbit): >2000 mg/kg.
Skin Corrosion/Irritation: Causes moderate to severe irritation, redness, and pain. Repeated skin contact may cause dermatitis.
Eye Damage/Irritation: Exposure leads to severe irritation, pain, and possible eye damage.
Respiratory Sensitization: May cause allergic reactions, dizziness, or headaches when inhaled.
Chronic Effects: Prolonged exposure linked to skin and respiratory sensitization. Methanol generated by hydrolysis may cause systemic toxicity.
Carcinogenicity: Not classified as carcinogenic by IARC, NTP, or OSHA.
Mutagenicity: No reliable mutagenicity data available.
Reproductive Toxicity: Methanol byproduct poses reproductive hazards upon chronic exposure.
Aquatic Toxicity: No direct studies, but hydrolyzed product and methanol have notable aquatic toxicity. Methanol: LC50 (fish, 96 hr): 13,000 mg/L.
Persistence and Degradability: Hydrolyzes in water to methanol and silanol, which degrade further. Slow degradation in soil and water for parent compound.
Bioaccumulative Potential: Low for parent compound; methanol has moderate potential.
Soil Mobility: Methanol highly mobile in soil; parent silane likely less mobile.
Other Adverse Effects: Prevent entry into natural water sources and soil. Toxic to aquatic organisms in high concentrations.
Waste Disposal: Collect residues and absorbents in sealed, labeled containers. Dispose only by incineration in accordance with local, state, and federal regulations. Hold for collection by licensed hazardous waste contractor.
Container Disposal: Triple-rinse containers before disposal. Puncture or crush containers to prevent reuse. Follow chemical packaging regulations.
Environmental Restrictions: Never dispose into surface water, sewer, or soil.
UN Number: 2810
Shipping Name: Toxic liquid, organic, n.o.s. (contains N-[3-(Trimethoxysilyl)propyl]aniline)
Hazard Class: 6.1 (Poisonous substances)
Packing Group: III
Label Requirements: Toxic, flammable liquid
Environmental Hazards: Not regulated as a marine pollutant, but prevent large releases.
Special Precautions: Transport only in unbreakable, leak-proof containers. Segregate from food, feedstuff, medicines.
OSHA Status: Hazardous – acute, skin, and eye irritant.
TSCA Inventory: Listed
SARA Title III Sections 311/312: Acute health hazard
SARA Title III Section 313: Not subject
RCRA Status: Classified as hazardous waste under EPA regulations, due to toxicity and ignitability
California Prop 65: Methanol (produced by hydrolysis) is listed, developmental toxin
Other Regulations: Subject to workplace health and safety standards; follow label and safety instructions closely for all local jurisdictions.
