Product Name: Bis[3-(Triethoxysilyl) Propyl]Disulfide
CAS Number: 40372-72-3
Synonyms: Disulfide silane, Silane coupling agent
Recommended Use: Surface treatment agent, industrial bonding promoter, rubber processing chemical
Supplier Information: Manufacturer contact details and emergency telephone number included on label
Emergency Overview: Colorless to pale yellow liquid with slight odor
GHS Classification: Skin irritation category 2, eye irritation category 2A, acute aquatic toxicity category 2
Signal Word: Warning
Hazard Statements: Causes skin irritation, causes serious eye irritation, toxic to aquatic life
Pictograms: Exclamation mark, environmental hazard
Precautionary Statements: Avoid breathing vapor or mist, wear protective gloves and eye protection, prevent entry into waterways
Potential Health Effects: Redness and pain on skin contact, eye watering and redness, possible nausea and headache if inhaled in high concentration
Chemical Name: Bis[3-(Triethoxysilyl) Propyl]Disulfide
CAS Number: 40372-72-3
Concentration: ≥ 98%
Impurities: Trace residues of ethanol and other alkoxysilanes, typically less than 2% combined
Other Components: No hazardous components present above reporting threshold
Inhalation: Remove person to fresh air, keep comfortable for breathing, seek medical attention if symptoms appear
Skin Contact: Wash thoroughly with plenty of soap and water, remove contaminated clothing, seek medical attention for persistent irritation
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses if present, seek immediate medical attention
Ingestion: Rinse mouth, do not induce vomiting, seek prompt medical advice
Suitable Extinguishing Media: Water spray, foam, carbon dioxide, dry chemical powder
Unsuitable Media: Direct water jet may spread burning material
Specific Hazards: Combustion can produce irritating and toxic gases such as sulfur oxides, carbon monoxide, silicon oxides
Protective Equipment: Firefighters wear self-contained breathing apparatus and chemical protective clothing
Advice for Firefighters: Cool containers exposed to fire with water to prevent rupture, contain runoff to avoid contamination of water sources
Personal Precautions: Use personal protective equipment including gloves, goggles, suitable respirator in case of insufficient ventilation
Environmental Precautions: Prevent entry into waterways, sewers, basements or confined areas
Methods for Containment: Absorb spilled material with inert non-combustible absorbent such as sand or earth
Cleanup Methods: Shovel or sweep absorbed material and collect in appropriate containers for disposal
Reference to Other Sections: See sections on personal protection and disposal considerations for additional advice
Precautions for Safe Handling: Work in well-ventilated areas, avoid contact with skin, eyes and clothing, do not breathe vapors, practice good industrial hygiene
Conditions for Safe Storage: Store in tightly closed containers, in cool, dry and well-ventilated area, keep away from moisture, acids and oxidizers
Incompatible Materials: Strong oxidizing agents, acids, moisture
Specific End Uses: Consult technical guidelines for equipment and application details
Occupational Exposure Limits: No established exposure limits for this compound, maintain airborne levels below nuisance limits
Engineering Controls: Local exhaust ventilation, fume hood recommended
Personal Respiratory Protection: Approved air-purifying respirator for organic vapors if ventilation insufficient
Hand Protection: Chemical-resistant gloves such as nitrile or neoprene
Eye Protection: Chemical safety goggles or face shield
Skin and Body Protection: Protective clothing such as aprons and sleeves
Environmental Controls: Measures in place to prevent release to environment and containment of any accidental spills
Appearance: Clear to pale yellow liquid
Odor: Slight ether-like
Odor Threshold: Not determined
pH: Not applicable
Melting Point/Freezing Point: Below -50°C
Boiling Point/Range: 350°C at atmospheric pressure
Flash Point: 134°C (closed cup)
Evaporation Rate: Not available
Flammability: Combustible liquid
Explosion Limits: Not established
Vapor Pressure: <0.1 mmHg at 25°C
Vapor Density: Heavier than air
Relative Density: 1.08 – 1.12 g/cm³ at 25°C
Solubility: Poor solubility in water, hydrolyzes slowly
Partition Coefficient (n-octanol/water): Not available
Auto-ignition Temperature: Not determined
Decomposition Temperature: Not determined
Viscosity: 10-25 mPa·s at 25°C
Chemical Stability: Stable under routine conditions, may hydrolyze in contact with water or moisture
Reactive Hazards: Reacts with strong oxidizing agents, acids and bases
Conditions to Avoid: Excessive heat, open flames, contact with acids or moisture
Hazardous Decomposition Products: May release hazardous gases such as oxides of carbon, sulfur, silicon, ethanol fumes
Polymerization: No reports of hazardous polymerization under recommended conditions
Acute Toxicity: Oral LD50 (rat) > 2,000 mg/kg, dermal LD50 (rat) > 2,000 mg/kg
Skin Corrosion/Irritation: Causes moderate irritation by direct contact
Serious Eye Damage/Irritation: Causes irritation and possible damage to eye tissue
Respiratory Sensitization: Prolonged inhalation may cause irritation of respiratory tract
Skin Sensitization: Not classified as sensitizer based on available information
Repeated Dose Toxicity: Prolonged or repeated skin exposure can cause defatting and dermatitis
Mutagenicity: Not classified as mutagenic; available information insufficient for conclusive classification
Carcinogenicity: No agencies have classified this product as carcinogenic
Reproductive Toxicity: Not expected based on information available
Other Information: No evidence of systemic effects from normal industrial use
Aquatic Toxicity: Toxic to aquatic organisms, may cause adverse effects in the aquatic environment
Persistence and Degradability: Hydrolyzes slowly in water, forms stable silanol and organic byproducts
Bioaccumulation Potential: Not expected to bioaccumulate significantly
Mobility in Soil: Low to moderate mobility, binds to soil particles
Other Adverse Effects: Avoid release in large quantities to water bodies or public sewers
Waste Disposal Methods: Dispose of in accordance with national and local environmental regulations
Incineration: Permitted for small amounts at high temperature with proper controls
Container Disposal: Rinse thoroughly, puncture or crush before recycling or disposal
Special Precautions: Do not allow material or rinsate to enter drains, surface water or groundwater
EU Waste Code: Consult applicable regulations for appropriate waste classification
UN Number: Not regulated as dangerous for transport
Transport Hazard Class: Non-hazardous for road, rail, air and sea transport
Packing Group: Not applicable
Marine Pollutant: Not classified as marine pollutant
Special Precautions: Secure containers upright during transport, prevent leakage or spillage
Labels: General caution labeling recommended
OSHA: Not specifically regulated under OSHA hazardous substances standard
TSCA: Listed on Toxic Substances Control Act inventory
REACH: Registered under Regulation (EC) No 1907/2006
DSL/NDSL: Listed in Canadian Domestic Substances List
Other Regulations: Workplace labeling and safety data sheet required as per national workplace safety guidelines
Restriction: No specific restrictions identified for industrial use
Chemical Safety Assessment: Carried out as required by REACH for registered substances
