Product Name: Octylmethyldiethoxysilane
Chemical Family: Organosilane
CAS Number: 78660-56-9
Molecular Formula: C13H30O2Si
Molecular Weight: 246.47 g/mol
Trade Names: No common trade names recognized
Manufacturer: Refer to local supplier
Uses: Surface modifier, water repellent, chemical intermediate
Contact Numbers: Emergency response and technical support numbers provided by supplier
Hazard Classification: Flammable liquid, Eye irritant, Skin irritant
Signal Word: Warning
Hazard Statements: Causes mild skin irritation, may cause serious eye irritation, vapors may cause drowsiness or dizziness, flammable liquid and vapor
Pictograms: Flame, exclamation mark
Precautionary Statements: Keep away from heat/sparks/open flames, avoid breathing vapors, wash skin thoroughly after handling, use in well-ventilated areas, wear eye and face protection
Chemical Name: Octylmethyldiethoxysilane
Concentration: >95%
Impurities: Trace residuals of unreacted silanes (<1%)
Stabilizers: None added
Additives: None recognized
Inhalation: Immediately remove exposed person to fresh air, seek medical attention if symptoms like dizziness or nausea develop
Skin Contact: Remove contaminated clothing, wash skin thoroughly with soap and water for several minutes, seek attention if irritation persists
Eye Contact: Rinse with water for at least fifteen minutes, keep eyelids apart and away from eyeball, remove contact lenses, call for prompt medical attention
Ingestion: Rinse mouth, drink plenty of water if conscious, do not induce vomiting, seek medical advice
Notes for Physician: Treat symptomatically based on clinical judgment
Flash Point: Typically between 50–60°C (122–140°F)
Extinguishing Media: Dry chemical, carbon dioxide, alcohol-resistant foam, water spray (never use direct water stream)
Special Hazards: Vapors can form explosive air-vapor mixtures, combustion releases carbon oxides and silicon dioxide
Protective Equipment: Self-contained breathing apparatus, full protective clothing
Firefighting Procedures: Evacuate area, cool containers with water spray to prevent bursting, contain contaminated water
Personal Precautions: Restrict access, ventilate area, avoid breathing vapors, wear suitable PPE including gloves, goggles, protective clothing
Spill Containment: Absorb with inert material like sand or vermiculite, collect in sealable containers
Environmental Precautions: Prevent material from entering drains or waterways
Clean-Up: Wash spill area with water and detergent, ventilate until completely dry
Disposal: Dispose of absorbent and contaminated materials as hazardous waste, follow local regulations
Safe Handling: Use in areas with ventilation, avoid all sources of ignition, avoid skin and eye contact
Technical Measures: Use grounded equipment, spark-proof tools
Storage Conditions: Store in tightly sealed containers, keep cool, dry, away from heat, oxidizing agents, acids, moisture
Recommended Materials for Containers: Stainless steel, plastic compatible with organic solvents
Storage Temperature: Keep between 5°C and 30°C, avoid freezing
Occupational Exposure Limits: No established limit for this compound, consult analogous silanes for guidance
Engineering Controls: Local exhaust ventilation, explosion-proof electrical equipment, fume hoods
Personal Protective Equipment: Chemical-resistant gloves, safety goggles or face shield, protective clothing, NIOSH-approved respirator for high vapor concentrations
Hygiene Measures: Wash hands before breaks and after work, remove contaminated clothing, avoid eating or drinking in work area
Appearance: Clear, colorless to pale yellow liquid
Odor: Mild, characteristic odor similar to other silanes
pH: Not applicable (non-aqueous)
Melting Point: Not determined, expected below -50°C
Boiling Point: 237–245°C (459–473°F)
Flash Point: 50–60°C (122–140°F)
Evaporation Rate: Slower than ether
Flammability Limits: Lower: 0.8%, Upper: 7.0% (estimated)
Vapor Pressure: <1 mmHg at 25°C
Vapor Density: Heavier than air
Relative Density: 0.87–0.89 (water = 1)
Solubility: Slightly soluble in water, mixes with most organic solvents
Partition Coefficient (log Kow): Data not available
Viscosity: 1–3 mPa·s at 25°C
Autoignition Temperature: >200°C (estimated)
Chemical Stability: Stable at recommended storage conditions
Reactivity: Reacts with water, generates ethanol and silanols
Hazardous Reactions: Contact with acids, moisture, or oxidizers can cause hazardous polymerization
Decomposition Products: Ethanol, silicon oxides, carbon oxides
Incompatible Materials: Strong acids, bases, oxidizing agents, water/moisture
Acute Toxicity: Oral (rat): LD50 > 2000 mg/kg; Dermal (rabbit): LD50 > 2000 mg/kg
Skin Corrosion/Irritation: May cause mild irritation on contact
Eye Damage/Irritation: Can cause serious irritation, redness, tearing
Respiratory Sensitization: Not classified, mild irritation possible at high concentrations
Skin Sensitization: Not a known sensitizer
Chronic Effects: Prolonged exposure may lead to dryness, cracking of skin; no evidence of long-term toxicity reported in standard studies
Carcinogenicity: No evidence in animal studies, not listed by IARC or NTP
Mutagenicity: Not known to be mutagenic
Reproductive Toxicity: Not expected based on animal data
Toxicity to Aquatic Life: Not acutely toxic to aquatic organisms at typical concentration ranges
Persistence and Degradability: Hydrolyzes slowly in water, further degrades by microbial action
Bioaccumulation Potential: Low to moderate, limited data
Mobility in Soil: Moderately mobile, hydrolyzed product less mobile
Other Adverse Effects: Avoid release to the environment, follow strict containment procedures
Waste Disposal: Dispose by incineration in approved facility, do not landfill, do not pour into drains
Container Disposal: Empty containers can retain vapors, triple rinse and puncture before disposal, follow institutional disposal guidance
Regulatory Status: Classified as hazardous waste in several jurisdictions, always consult local regulations
UN Number: UN1993
Proper Shipping Name: Flammable Liquid, n.o.s. (contains Octylmethyldiethoxysilane)
Transport Hazard Class: 3 (Flammable liquid)
Packing Group: III
Labeling Requirements: Flammable liquid
Special Provisions: Follow local transportation requirements for hazardous materials
Environmental Hazards: Not considered marine pollutant
Safety, Health, Environmental Regulations: Subject to OSHA Hazard Communication Standard in the US, included in EINECS/ELINCS (EU), TSCA listed (US), DSL (Canada)
SARA/Title III: Not listed as extremely hazardous, no special reporting requirements
REACH Status: Registered for industrial use in the EU
California Proposition 65: Not listed
WHMIS (Canada): Classified as hazardous product
Other International Inventories: Listed in Japan ENCS, China IECSC, Australia AICS
Specific Regulations: Follow workplace health and fire safety codes
