Product Name: Octylsilane Oligomer
Chemical Family: Organosilane compound
Synonyms: Octyltriethoxysilane-containing siloxane
CAS Number: Specific mixture — not a single CAS; related to octyltriethoxysilane (CAS 2943-75-1)
Recommended Use: Surface treatment for glass, ceramics, mineral fillers, or silicone elastomer modification
Supplier: Manufacturer and distributor information available on container label
Emergency Phone: Refer to supplier contact sheet, typically available 24/7 for emergencies
Classification: Flammable liquid, skin and eye irritant, harmful if inhaled
GHS Labels: Flame, Exclamation Mark (irritant), Health Hazard
Signal Word: Warning
Hazard Statements: Causes skin and eye irritation, may cause respiratory irritation, flammable liquid and vapor
Precautionary Statements: Keep away from heat, sparks, and flames, use only outdoors or in well-ventilated area, wear protective gloves, eye and face protection
Potential Health Effects: Irritation to eyes, nose, throat, and skin, dizziness or nausea at high vapor concentrations
Chemical Composition: Mixture of alkyl(alkoxy)silane oligomers
Main Component: Octylsilane oligomeric fraction (content >80%)
Minor Ingredients: Triethoxyoctylsilane monomer, silica impurities, silanol condensation byproducts
Impurities: Ethanol or isopropanol (hydrolysis byproduct), water <0.1%, trace residual acids/bases
EC Number: Not assigned for oligomer mixtures
Specific Ingredient Ranges: Values change by batch, SDS from producer supplies accurate concentration
Eye Contact: Rinse immediately with plenty of water for at least 15 minutes, remove contact lenses if present, continue rinsing, seek medical attention if irritation persists
Skin Contact: Take off contaminated clothing, rinse skin with soap and water for several minutes, consult physician for persistent redness or discomfort
Inhalation: Move person to fresh air, keep at rest in a position comfortable for breathing, get medical attention if symptoms such as dizziness, headache, or coughing appear
Ingestion: Rinse mouth, do not induce vomiting, give water to dilute, consult physician immediately, do not provide anything by mouth to unconscious person
Symptoms: Redness, headaches, irritation, dizziness, nausea possible after large exposure
Suitable Extinguishing Media: Carbon dioxide (CO2), dry chemical powder, foam, water spray (do not use full water jet)
Special Hazards: Vapors may form explosive mixtures with air, substance can float and ignite above spill area
Hazardous Combustion Products: Carbon oxides, silicon oxides, incompletely combusted hydrocarbons, formaldehyde (at high temperatures)
Firefighting Precautions: Keep upwind, evacuate area, wear self-contained breathing apparatus (SCBA), use chemical protective clothing
Special Equipment: Protective gloves, boots, helmet with face shield
Personal Precautions: Prevent skin and eye contact, ventilate area, eliminate ignition sources, ensure proper personal protection (respirator, gloves, goggles)
Environmental Precautions: Prevent spill entering drains, soil, or surface waters, inform authorities if product contaminates environment
Containment: Stop leak, contain spill with sand or inert absorbent, prevent vapor spread using water spray (mist only)
Cleanup Methods: Absorb with inert materials (sand, vermiculite), scoop into labeled waste container, dispose following local regulations
Handling: Avoid breathing gas/vapor/mist, use only with adequate ventilation, avoid open flames, do not eat, drink, or smoke when using, wash hands thoroughly after handling
Storage Conditions: Keep container tightly closed, store in a dry, cool, well-ventilated area, away from sources of ignition or strong oxidizing agents
Storage Temperature: Preferably below 30°C, avoid freezing
Incompatible Materials: Acids, strong bases, oxidizers, moisture (prevents hydrolysis)
Packaging Materials: Store in original containers made of HDPE, stainless steel, or coated drums
Engineering Controls: Local exhaust ventilation or fume hoods, explosion-proof equipment in handling areas, monitor vapor levels periodically
Exposure Limits: No established TLV for octylsilane oligomer; ACGIH short-term limits for ethanol if present (TWA 1000 ppm)
Personal Protection Equipment: Chemical-resistant gloves (nitrile), goggles or face shield, flame-retardant lab coat or apron, respiratory protection (organic vapor cartridge) if exposure exceeds recommended threshold
Hygiene Measures: Wash hands, remove contaminated clothing, decontaminate surfaces prior to reuse
Appearance: Clear to pale yellow liquid
Odor: Mild, faintly organic or alcoholic
pH: Not applicable (not soluble in water)
Melting Point: < -50°C
Boiling Point: >200°C (decomposition may occur before boiling)
Flash Point: 80 - 100°C (closed cup, varies with batch)
Evaporation Rate: Slower than ether, faster than water
Flammability: Combustible liquid
Vapor Pressure: <10 Pa at 25°C
Vapor Density: >1 (air=1)
Solubility: Insoluble in water, miscible with most organic solvents
Partition Coefficient (log Kow): >7 (predicted, highly lipophilic)
Decomposition Temperature: >250°C
Viscosity: 30-50 cSt (25°C, depends on oligomeric fraction)
Chemical Stability: Stable under recommended storage conditions, hydrolyzes slowly in moist air
Reactivity: Reacts with moisture to form silanols and alcohol, exothermic in presence of acids/bases
Incompatible Materials: Strong oxidizing agents, mineral acids, bases, water (hydrolysis risk)
Hazardous Decomposition Products: Silicon dioxide, alcohols, formaldehyde, carbon oxides under fire conditions
Polymerization: Not expected under normal use; polymerization possible with strong acid/base catalysis
Routes of Exposure: Inhalation, skin, and eye contact
Acute Toxicity Data: LD50 (oral, rat): >2,000 mg/kg (monomer), LD50 (dermal, rat): >2,000 mg/kg
Skin Corrosion/Irritation: Causes moderate irritation
Eye Damage/Irritation: Causes irritation (redness, tearing)
Respiratory Sensitization: Prolonged exposure possible upper airway irritation
Repeated Dose Toxicity: No evidence of irreversible toxicity in animal studies at moderate doses
Carcinogenicity: Not classified, no data linking oligomers to cancer
Mutagenicity: Not observed in standard assays
Reproductive Toxicity: No evidence from available data on organosilanes
Symptoms: Eye, nose, skin irritation, headache, possible drowsiness after excessive inhalation
Toxicity to Aquatic Life: Fish LC50 (96 h): >100 mg/L (predicted), low acute aquatic toxicity
Persistence and Degradability: Oligomer hydrolyzes slowly in water, ultimately forms silica and alcohols
Bioaccumulation: Potential for significant accumulation in aquatic organisms due to high log Kow; limited mobility in soil
Mobility: Absorbed to organic matter, poor migration in water
Other Effects: Silica byproduct not toxic, but monomeric silanes hazardous to aquatic invertebrates
Waste Treatment Methods: Dispose of as hazardous waste under local regulations
Waste Disposal: Incinerate at a licensed facility, do not pour into drains or sewers, solidify with inert absorbent for safe transport
Container Disposal: Empty containers hazardous due to product residue — triple rinse and send to drum recycler or licensed landfill
Special Instructions: Consult regional disposal company familiar with organosilane wastes
UN Number: UN 1993 (Flammable Liquid, N.O.S., contains octyltriethoxysilane mixture)
Proper Shipping Name: Flammable liquid, n.o.s. (Octylsilane oligomer mixture)
Transport Hazard Class: 3
Packing Group: III
Labels: 3 (Flammable liquid)
Special Precautions: Keep away from food, feed, and incompatible materials during transport, secure containers upright
Environmental Hazards: Not considered marine pollutant under current regulations
Transport in Bulk: According to Annex II of MARPOL and IBC Code; avoid moisture ingress
International Inventories: Registered or exempted under REACH (EU), TSCA (USA), DSL (Canada), ENCS (Japan), KECI (Korea), or AICS (Australia) as alkoxysilane or relevant mixture
Safety, Health, Environment Regulations: Subject to workplace safety controls, flammable liquid handling regulations in US/EU, typical worker exposure limit standards apply
Labeling Requirements: GHS-compliant labels for storage, handling, shipping
SARA/Title III: Not listed as extremely hazardous substance; may require reporting above certain quantities due to flammability
Hazard Symbols: GHS02 (Flame), GHS07 (Exclamation mark)
Other Provisions: Considered hazardous chemical by OSHA Hazard Communication Standard; check local workplace acts for additional measures
