Product Name: Trimethoxyhydrosilane
Chemical Family: Organosilane
CAS Number: 2487-90-3
Manufacturer Identification: Supplier contact details, emergency phone number, email address
Use: Industrial synthesis, surface treatment, chemical intermediate
Synonyms: Methoxytrimethylsilane, Silane, trimethoxy
Recommended Use: Coupling agent for resins and polymers, silanization of surfaces, crosslinking agent in sealants
Hazard Classification: Flammable liquid (Category 2), Acute toxicity (inhalation, dermal, oral, Category 4), Skin corrosion/irritation (Category 2), Serious eye damage/irritation (Category 2A)
Signal Word: Danger
Hazard Statements: Highly flammable liquid and vapor, causes skin and serious eye irritation, may be harmful if swallowed, inhaled, or absorbed through the skin
Pictograms: Flame, exclamation mark
Precautionary Statements: Keep away from heat/sparks/open flames, avoid breathing vapors, wear protective gloves, eye and face protection, wash exposed skin thoroughly
Chemical Name: Trimethoxyhydrosilane
CAS Number: 2487-90-3
Concentration: ≥ 97%
Impurities: Methanol (possible trace amounts), other silanes (≤ 3%)
Additional Info: Substance does not contain additional ingredients that affect classification
Inhalation: Move individual to fresh air, monitor breathing, seek medical attention if symptoms persist, provide oxygen if breathing difficulty develops
Skin Contact: Remove contaminated clothing immediately, rinse skin with soap and plenty of water, keep area clean and dry, get medical advice if irritation or redness develops
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses if present and easy, continue rinsing, seek prompt medical advice
Ingestion: Rinse mouth, do not induce vomiting, offer water to dilute, seek immediate medical attention
Most Important Symptoms: Eye irritation, skin redness, sore throat, coughing, burning sensation, drowsiness or dizziness in high vapor concentrations
Special Notes to Physician: Treat symptomatically, monitor respiratory and cardiac function
Suitable Extinguishing Media: Alcohol-resistant foam, dry chemical powder, carbon dioxide (CO2), do not use direct water jet on product
Specific Hazards: Highly flammable, releases toxic and irritant fumes of silicon oxides or methanol under thermal decomposition or fire
Hazardous Combustion Products: Carbon monoxide, carbon dioxide, silicon dioxide, formaldehyde, methanol
Protective Equipment: Full protective gear, self-contained breathing apparatus for fire-fighters
Special Fire Procedures: Move containers from fire area if safe, cool fire-exposed drums with water spray, use caution for potential vapor cloud explosion
Further Information: Vapors may spread over considerable distances, flashback possible
Personal Precautions: Evacuate area, avoid inhalation or skin contact, ventilate area, eliminate sources of ignition
Environmental Precautions: Prevent release to drains, water sources, or soil, contain spillage using sand or inert absorbent
Spill Cleanup Methods: Absorb with non-combustible material (sand, earth, vermiculite), collect in chemical waste container, ventilate area thoroughly
Decontamination: Clean surfaces with plenty of water, do not use sparking tools
Notification: Inform authorities if product enters water sources or public sewers
Safe Handling: Use only in well-ventilated areas, avoid vapors and spray mists, wear appropriate PPE, ground and bond equipment, handle away from sources of ignition
Hygiene Recommendations: Wash hands and exposed skin after use, prohibit smoking, drinking, or eating in working area
Storage Conditions: Store tightly closed and upright in a cool, dry, well-ventilated place, segregate from oxidizers, acids, and direct sunlight
Storage Temperature: Keep below 30°C for stability
Packaging Materials: Use corrosion- and chemical-resistant materials, check container integrity regularly
Special Restrictions: Secure storage from unauthorized access
Exposure Limits: OSHA PEL for methanol (contaminant): TWA 200 ppm, ACGIH STEL 250 ppm, none established for main compound
Engineering Controls: Local exhaust required, process enclosure recommended, use explosion-proof equipment
Respiratory Protection: Approved organic vapor respirator if exposure limit exceeded or during emergencies
Eye Protection: Chemical splash goggles and face shield
Skin Protection: Nitrile or butyl rubber gloves, long-sleeved clothing, chemical-resistant footwear
Other Protection: Eyewash station, safety shower in working area, wash hands after handling
Monitoring: Air monitoring in enclosed work settings advised
Form: Liquid
Appearance: Clear, colorless/pale yellow
Odor: Slightly pungent, ether-like
Odor Threshold: Not specified
pH: Not applicable
Melting Point/Freezing Point: Below -50°C
Boiling Point: 94–97°C
Flash Point: 5°C (closed cup)
Evaporation Rate: Faster than n-butyl acetate
Flammability: Highly flammable
Vapor Pressure: 42 mm Hg at 20°C
Vapor Density: Heavier than air (approx. 3)
Relative Density: 0.950–0.970 g/cm3 at 20°C
Solubility: Reacts with water
Partition Coefficient n-octanol/water: Not determined
Autoignition Temperature: 270°C
Decomposition Temperature: Not established
Viscosity: Low, mobile liquid
Explosive Properties: Not explosive as substance, but vapor may form mixtures
Oxidizing Properties: Not classified as oxidizing
Chemical Stability: Stable under recommended storage conditions, reacts with water
Reactivity: Reacts vigorously with oxidizing agents, acids, and bases
Possibility of Hazardous Reactions: Exothermic reaction with water releases methanol, can emit flammable gas
Conditions to Avoid: Heat, flame, sparks, moisture, incompatible substances
Materials to Avoid: Strong acids, alkalis, oxidizing agents, water
Hazardous Decomposition: Methanol, silicon oxides, formaldehyde
Polymerization: Not anticipated under normal conditions
Acute Toxicity: Vapors may be toxic, oral and inhalation route can cause serious health problems
Skin Corrosion/Irritation: Skin irritant, redness and discomfort
Eye Damage/Irritation: Severe eye irritant, risk of corneal injury
Respiratory Sensitization: Prolonged inhalation may inflame airways
Germ Cell Mutagenicity: Not classified
Carcinogenicity: Not identified as a known carcinogen by major agencies
Reproductive Toxicity: Not established for product; methanol by-product may cause reproductive harm
Specific Target Organ Toxicity: May affect central nervous system, mucous membranes, eyes, and skin
Aspiration Hazard: Potential risk from ingestion and aspiration
Aquatic Toxicity: Limited data, methanol by-product toxic to aquatic life
Persistence and Degradability: Silane component hydrolyzes in water, forming silanols and methanol, both further degraded
Bioaccumulative Potential: Low for main compound, methanol does not bioaccumulate
Mobility in Soil: Hydrolyzes rapidly in moist environments, binds to soil particles
Other Adverse Effects: Spills threaten aquatic ecosystems, avoid product release in the environment
Methods of Disposal: Incineration under controlled conditions in accordance with local, state, and federal regulations
Product Disposal: Treat as hazardous waste, consult licensed waste disposal contractors
Container Handling: Triple rinse containers, do not reuse, ensure complete drain, recycle or dispose per regulations
Special Notes: Prevent entry into surface or groundwater, do not landfill liquid waste, label all waste containers
Disposal Legislation: Follow environmental protection act, hazardous waste codes where applicable
UN Number: UN 1993
UN Proper Shipping Name: Flammable liquid, n.o.s. (contains Trimethoxyhydrosilane)
Transport Hazard Class: 3 (Flammable liquids)
Packing Group: II (medium danger)
Label Requirements: Flammable liquid
Marine Pollutant: Not classified
Special Transport Precautions: Secure upright, avoid extreme heat, ensure spill control supplies available during transport
US Regulation: TSCA-listed, CERCLA and EPCRA reporting may be triggered by methanol content
OSHA Hazcom: Classified as hazardous chemical
Canada: DSL-listed, WHMIS hazard classes: B2, D2B
EU Regulations: Covered by REACH, classified under CLP Regulation (EC) No 1272/2008
International Regulations: GHS aligned labeling, transport regulated under IMDG, ADR, IATA
Other Legislation: Local air quality and wastewater regulations may apply, occupational exposure standards regulated in many countries
