Product Name: Iso-Octyltriethoxysilane
Chemical Formula: C14H32O3Si
Synonyms: Triethoxy(iso-octyl)silane
CAS Number: 35435-21-3
Manufacturer: Contact your local distributor or the specific chemical provider for accurate supplier information. In practice, reliable contact details should be listed on the actual container label for rapid access during emergencies.
Recommended Use: Often used as a surface modifier for adhesives, sealants, and coatings in various industrial processes.
Emergency Contact: Refer to supplier’s emergency telephone number.
Classification: Flammable liquid, skin irritant, eye irritant, possible aspiration hazard
Label Elements: Flammable pictogram, exclamation mark for irritancy
Hazard Statements: May cause skin and eye irritation, vapors may cause drowsiness or dizziness, toxic to aquatic life
Precautionary Statements: Keep away from open flames and hot surfaces. Avoid release to the environment without controls. Use only in well-ventilated spaces. Wear chemical-resistant gloves, splash-proof goggles, and protective clothing.
Signal Word: Warning
Chemical Identity: Iso-Octyltriethoxysilane
CAS Number: 35435-21-3
Concentration: >95%
Impurities: Small amounts of related alkoxysilanes or hydrolysis products can sometimes be present. If supplied as a blend, refer to specific manufacturer data.
Inhalation: Remove exposed individuals to fresh air promptly. If breathing becomes difficult, professional medical attention is needed immediately.
Skin Contact: Wash thoroughly with plenty of water and soap. Take off contaminated clothing to avoid prolonged skin contact.
Eye Contact: Flush eyes gently with water for at least fifteen minutes, lifting eyelids as needed, then seek medical assessment.
Ingestion: Do not induce vomiting; rinse mouth and seek urgent medical evaluation because aspiration into lungs is a primary risk.
Most Important Symptoms: Skin and eye irritation, headache, dizziness, possible lung damage if aspirated.
Suitable Extinguishing Media: Use water spray, foam, dry powder, or carbon dioxide. Avoid direct streams of water which may spread the fire.
Specific Hazards: Generates flammable vapors heavier than air; risk of flashbacks if ignited. Decomposition releases toxic and irritating fumes, including oxides of silicon and carbon.
Protective Equipment: Firefighters require self-contained breathing apparatus and full protective gear during response.
Additional Advice: Move containers out of fire area if safe. Cool exposed containers with water spray to prevent pressure build up.
Personal Precautions: Ventilate enclosed areas, remove sources of ignition, keep unprotected personnel out. Only trained crews should engage.
Environmental Precautions: Prevent spills from entering drains, waterways, or soil due to aquatic toxicity.
Cleanup Methods: Contain with inert absorbent (sand or earth), collect residue with shovel, then transfer to labeled drum for disposal. Use non-sparking tools. After pick-up, clean the area thoroughly.
Safe Handling: Always ground containers during transfer, avoid static discharge. Use in well-ventilated areas; avoid inhaling vapors and skin contact.
Storage Conditions: Store in tightly closed containers away from moisture, heat, direct sunlight, and incompatible materials.
Incompatible Materials: Avoid water, alcohols, acids, strong oxidizing agents. Prevent contact with humid air which promotes hydrolysis.
Hygiene Measures: Wash hands after handling and before eating, keep work clothes separate from street clothes.
Exposure Limits: At present, no established exposure limits for iso-octyltriethoxysilane exist, so reduce exposure as low as possible using best engineering controls.
Engineering Controls: Local exhaust ventilation, general mechanical ventilation, explosion-proof equipment as needed.
Personal Protective Equipment: Chemical splash goggles, impervious gloves (such as nitrile), flame-retardant laboratory coat, chemical-resistant boots if large quantities. Respiratory protection if ventilation is poor.
Environmental Controls: Enclosed process handling, vapor recovery systems, prevent release into soil or water courses.
Appearance: Clear, colorless to pale yellow liquid
Odor: Mild, organic odor
Odor Threshold: Not specified in literature
pH: Not applicable (non-aqueous)
Melting Point/Freezing Point: Below -50°C
Boiling Point: 270–280°C estimated
Flash Point: Approximately 86°C (tag closed cup)
Evaporation Rate: Low
Flammability: Flammable liquid
Lower/Upper Flammability Limits: Data not widely available, use caution in confined spaces
Vapor Pressure: estimated <0.5 mm Hg at 25°C
Vapor Density: Heavier than air
Solubility: Insoluble in water, slow hydrolysis
Partition Coefficient (n-octanol/water): Not specified
Auto-ignition Temperature: Not widely published; treat as readily flammable
Decomposition Temperature: Not widely published
Viscosity: Moderate, typical for alkoxysilanes
Chemical Stability: Stable at ambient temperatures if kept sealed and dry. Exposure to moisture starts hydrolytic decomposition.
Hazardous Reactions: Exothermic reaction with water or alcohol, forms ethanol which is flammable.
Incompatible Materials: Keep separate from oxidizers, acids, bases, water, strong reducing agents.
Hazardous Decomposition Products: Silicon oxides, carbon oxides, ethanol vapor during combustion or hydrolysis.
Polymerization: Not expected under normal storage.
Likely Routes of Exposure: Inhalation, skin and eye contact, accidental ingestion
Acute Toxicity: Few published values, but no evidence for extreme toxicity. Risk increase for the lungs if aspirated.
Skin Irritation: Can cause drying, redness, irritation with prolonged exposure.
Eye Irritation: Causes redness, watering, blurred vision.
Chronic Effects: Not fully characterized; repeated contact could sensitize or worsen skin conditions.
Carcinogenicity, Mutagenicity, Reproductive Toxicity: No published studies showing direct links. Prevent unnecessary, extended contact.
Other Information: Vapors irritate mucous membranes.
Aquatic Toxicity: Toxic to aquatic organisms, possible long-term effects in water environments.
Persistence and Degradability: Hydrolyzes slowly in moist air forming ethanol and silanols, which bind to minerals.
Bioaccumulation: Little evidence of significant bioaccumulation because of slow hydrolysis.
Mobility: Spills sink in water, but do not dissolve; bind to sediments.
Other Adverse Effects: Risk to aquatic environments increases with improper waste disposal or uncontrolled releases.
Disposal Methods: As a hazardous waste, send for incineration or treatment at licensed facility. Never pour down the drain, into soil, or natural water bodies.
Container Disposal: Follow local regulatory requirements for chemical packaging; containers must be triple-rinsed and punctured before disposal.
UN Number: 1993
UN Proper Shipping Name: Flammable liquid, n.o.s. (contains iso-octyltriethoxysilane)
Transport Hazard Class: 3 (Flammable liquid)
Packing Group: III
Marine Pollutant: Yes, significant aquatic risk means marked as such for international shipping.
Other Info: Ensure containers remain upright, tightly sealed, protected from physical damage during shipment, labeled in accordance with law.
REACH Registration: Check for specific supplier compliance within the European Union.
OSHA Hazard Communication: Flammable liquid and irritant, appears on hazardous chemical lists.
SARA Title III: Not listed under Extremely Hazardous Substances, but the user must confirm reporting requirements.
TSCA: Listed for industrial use; additional environmental controls may be enforced.
Other National and International Regulations: Consult workplace safety office for country-specific controls on silanes or alkoxysilane derivatives.
