Product Name: N,N-Dimethylaminopropyltrimethoxysilane
Synonyms: 3-(Dimethylamino)propyltrimethoxysilane, DMPTMS
Manufacturer: [Manufacturer info]
Recommended Use: Silane coupling agent, surface modifier
Emergency Contact: [Emergency phone number]
UN Number: 1993
GHS Classification: Flammable liquid (Category 3), Skin irritation (Category 2), Eye irritation (Category 2A), Acute toxicity (oral, Category 4)
Signal Word: Warning
Hazard Statements: Causes skin irritation. Causes serious eye irritation. Harmful if swallowed. Flammable liquid and vapor.
Pictograms: Flame, Exclamation mark
Precautionary Statements: Avoid breathing vapors. Keep away from heat, sparks, open flames. Wear protective gloves, eye protection, and face protection.
Chemical Identity: N,N-Dimethylaminopropyltrimethoxysilane
CAS Number: 3069-29-2
EC Number: 221-336-6
Concentration: >98%
Impurities and Stabilizing Additives: Trace residuals only; no known hazardous impurities in commercial grades.
Inhalation: Move affected person to fresh air. Seek medical attention if symptoms persist such as cough, dizziness, or respiratory discomfort.
Skin Contact: Remove contaminated clothing and rinse skin with water for at least 15 minutes. Seek medical attention for persistent irritation.
Eye Contact: Flush eyes cautiously with water for several minutes. Remove contact lenses if present. Continue rinsing and get medical attention.
Ingestion: Rinse mouth. Do not induce vomiting. Call poison control or doctor right away.
Symptoms: Irritation, redness of eyes and skin, nausea, difficulty breathing after significant inhalation.
Suitable Extinguishing Media: Alcohol-resistant foam, dry powder, carbon dioxide (CO₂), water spray for small fires only.
Unsuitable Media: Direct water jet may spread flammable liquid.
Hazardous Combustion Products: Carbon oxides, nitrogen oxides, silicon oxides, formaldehyde, toxic fumes.
Special Protective Equipment: Firefighters wear self-contained breathing apparatus and full protective suit.
Fire/Explosion Hazards: Vapors may form explosive mixtures with air. Containers exposed to heat can explode. In case of large fire or spills, evacuate area, prevent runoff.
Personal Precautions: Ensure adequate ventilation. Remove sources of ignition. Wear suitable personal protection like chemical-resistant gloves, goggles, boots.
Environmental Precautions: Prevent spillage from entering drains, sewers, surface or groundwater. Notify authorities in case of environmental contamination.
Cleanup Methods: Use inert absorbent material (e.g., sand, earth). Collect residue into sealable, labeled containers for disposal. Wash area with water after spill, avoid generating aerosols.
Emergency Procedures: Isolate escape routes, restrict access. Use non-sparking tools.
Handling: Work only in well-ventilated spaces. Avoid inhaling vapors, contact with eyes, or skin. Ground and bond containers when transferring. Take protective precautions against static discharge.
Storage: Keep material tightly sealed in original containers. Store out of direct sunlight in a dry, cool, well-ventilated area away from sources of ignition, moisture, oxidizers, acids.
Incompatible Materials: Water, oxidizing substances, alcohols, acids, bases.
Other Precautions: Ensure storage facilities are equipped with spill containment systems and eyewash stations.
Exposure Limits: No established occupational exposure limits in many jurisdictions, but keep airborne concentrations as low as possible.
Engineering Controls: Use local exhaust ventilation, fume hood or process enclosure to keep vapors below permissible levels.
Personal Protective Equipment: Safety goggles, chemical-resistant gloves (nitrile, neoprene), flame-resistant clothing, laboratory coats. Respirator (organic vapor type) if ventilation is poor.
Hygiene Measures: Wash hands before eating, drinking, smoking, or leaving the work area. Shower and change clothes after handling.
Appearance: Clear, colorless to pale yellow liquid
Odor: Amino/ammonia-like
Odor Threshold: Not available
pH: Not determined (hydrolyzes in water)
Melting Point/Freezing Point: Below -50°C
Boiling Point/Range: Around 210°C (410°F)
Flash Point: 72°C (closed cup)
Evaporation Rate: Not available
Flammability: Flammable liquid
Explosion Limits: Upper: 8% / Lower: 1.1% (estimated)
Vapor Pressure: 0.15 kPa at 20°C
Vapor Density: Heavier than air
Relative Density: 0.94–0.98 (at 20°C)
Solubility: Reacts with water forming methanol and silanols
Partition Coefficient (log Kow): No data
Autoignition Temperature: 245°C
Decomposition Temperature: Not available
Viscosity: Approx. 1.2 cP at 25°C
Chemical Stability: Stable under recommended handling and storage conditions. Unstable in presence of water/moisture due to hydrolysis.
Reactivity: Can react vigorously with water, acids, bases, and oxidizing agents. Generates methanol on hydrolysis.
Hazardous Decomposition Products: Methanol, formaldehyde, carbon oxides, nitrogen oxides.
Polymerization: No reports of hazardous polymerization.
Conditions to Avoid: Heat, sparks, open flames, sources of static discharge, moisture.
Acute Toxicity: Oral LD50 (rat): approx. 2000 mg/kg. Dermal and inhalation LD50 not well established.
Skin Corrosion/Irritation: Can cause moderate to severe skin irritation upon contact.
Eye Damage/Irritation: Damages eye tissue, causing redness, watering, pain, possible blurred vision.
Respiratory/ Skin Sensitization: No provable evidence for sensitization through inhalation or dermal exposure.
Chronic Effects: Prolonged exposure can dry, crack, or damage skin. Chronic inhalation exposure not thoroughly studied.
Carcinogenicity/Mutagenicity: Not classified as carcinogen or mutagen by IARC, NTP, OSHA.
Other Data: Hydrolysis produces methanol, which is toxic by ingestion, inhalation, or absorption.
Ecotoxicity: Data limited, but hydrolysis product methanol is toxic to aquatic life in moderate concentrations. The silanol produced can bind to sediment.
Persistence and Degradability: Hydrolyzes rapidly in water forming methanol and silanol; methanol biodegrades readily.
Bioaccumulative Potential: Low for parent compound. Methanol does not accumulate in tissue.
Mobility in Soil: Expected to have moderate mobility, but quickly hydrolyzes.
Other Adverse Effects: Avoid uncontrolled release to environment. Contributes to local aquatic toxicity if large amounts are spilled.
Waste Treatment Methods: Dispose of as hazardous waste in accordance with local, regional, and national regulations.
Container Disposal: Triple-rinse container before disposal. Do not reuse. Offer for recycling or reconditioning if possible.
Disposal of Product: Incinerate in a chemical incinerator equipped with afterburner and scrubber. Small quantities may be diluted and neutralized before disposal.
Environmental Impact: Never discharge into drains or waterways.
UN Proper Shipping Name: Flammable Liquid, N.O.S. (contains N,N-Dimethylaminopropyltrimethoxysilane)
UN Number: 1993
Transport Hazard Class: 3 (Flammable Liquid)
Packing Group: III
Marine Pollutant: No
Transport Labels: Flammable Liquid symbol
Special Precautions: Keep container tightly closed in upright position. Avoid extremes of temperature during transit. Emergency response information should be available.
OSHA: Hazardous chemical under Hazard Communication Standard, 29 CFR 1910.1200.
TSCA Status: Listed on Toxic Substances Control Act Inventory.
DSL/NDSL (Canada): Listed/approved.
REACH Status (EU): Registered or pre-registered.
SARA Title III: Section 311/312 hazard categories include fire hazard and acute health hazard.
Other Inventory Listings: Present on Australian AICS, Japanese ENCS, Chinese IECSC.
Other Regulations: Observe workplace safety, health regulations, and local environmental management acts.
