Product Name: Efficient Light Colored Sulfur-Containing Silane Coupling Agent
Synonyms: Organosilane Coupling Agent, Sulfur-functional Trialkoxysilane
Recommended Use: Rubber compounding, tire manufacturing, adhesive enhancement
Manufacturer: [Manufacturer Information]
Emergency Contact: [24-hour Emergency Hotline Information]
GHS Classification: Flammable liquid (Category 3), Skin irritation (Category 2), Eye irritation (Category 2), Specific target organ toxicity-single exposure (Category 3: respiratory system), Hazardous to aquatic environment (Chronic Category 3)
Signal Word: Warning
Hazard Statements: Causes skin and eye irritation, may cause respiratory irritation, harmful to aquatic life with long-lasting effects, flammable liquid and vapor
Precautionary Statements: Avoid breathing vapors, wear protective clothing and gloves, use only with adequate ventilation, avoid release to environment, keep away from heat and ignition sources
Chemical Identity: Sulfur-functional silane, typically bis-(triethoxysilylpropyl)tetrasulfide or similar structure
CAS Number: 40372-72-3
Purity: >95%
Impurities: Ethanol (by-product), trace unreacted raw materials
Additive Components: Stabilizers to prevent hydrolysis, anti-oxidants for storage stability
Inhalation: Move affected person to fresh air without delay, maintain airway, seek medical advice if symptoms persist such as irritation, coughing, or shortness of breath
Skin Contact: Immediately wash skin with soap and plenty of running water, remove contaminated clothing, seek medical attention for persistent redness or blisters
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses, protect uninjured eye, obtain medical attention if visible irritation or pain continues
Ingestion: Rinse mouth with water, never give anything by mouth to an unconscious person, seek medical attention, do not induce vomiting unless instructed by emergency personnel
Symptoms to Watch: Redness, burning, coughing, headache, nausea if significant exposure occurs
Suitable Extinguishing Media: Alcohol-resistant foam, carbon dioxide, dry chemical, water spray (do not use strong water jet directly on the burning liquid)
Specific Fire Hazards: Vapors may form explosive mixtures with air, containers can rupture under heat, silicon oxides, carbon oxides, and sulfur oxides can form after decomposition
Personal Protective Equipment: Self-contained breathing apparatus, full protective gear.
Special Information: Cool containers with water spray from a safe distance to prevent pressure build-up and possible explosion, contain contaminated firefighting water
Personal Removal Precautions: Use appropriate PPE including chemical-resistant gloves, eye/face protection, avoid breathing vapors, evacuate unnecessary personnel
Environmental Precautions: Prevent further leakage or spillage, block entry to sewers and water sources, notify authorities if large quantities enter the environment
Clean-up Methods: Absorb with non-combustible absorbent (sand, earth, vermiculite), collect spilled material in sealed containers for proper disposal, wash site with water after material pick-up if appropriate
Safe Handling: Use only in well-ventilated areas, avoid contact with skin, eyes, and clothing, prevent static discharge by grounding containers and equipment, avoid inhalation of vapor, do not handle near open flame, heat, or other ignition sources
Storage Recommendations: Store in tightly closed original container, keep in a cool, dry, well-ventilated place, keep away from direct sunlight, incompatible chemicals include strong oxidizers, acids, and bases, no smoking in storage area
Engineering Controls: Ensure local exhaust ventilation at points of vapor generation, use enclosure if handling large volumes
Personal Protective Equipment: Chemical-resistant gloves (nitrile, neoprene), safety goggles or face shield, flame-resistant lab coat or apron
Respiratory Protection: Use approved respirator in poor ventilation or if exposure limits are exceeded
Exposure Limits: No permissible exposure limit set, handle as potentially hazardous based on similar organosilane compounds
Hygiene Measures: Wash hands thoroughly after handling, remove contaminated clothing and wash before reuse, do not eat, drink, or smoke during use
Physical State: Liquid
Color: Light yellow to pale
Odor: Mild sulfur-like
Odor Threshold: Not established
pH: Not applicable
Melting Point/Freezing Point: Below -40°C
Boiling Point: 200 - 300°C
Flash Point: 70 - 85°C (closed cup method)
Evaporation Rate: Slow
Flammability: Flammable
Vapor Pressure: Low at 20°C
Vapor Density: Greater than air
Specific Gravity: 1.1 - 1.2 at 25°C
Solubility: Insoluble in water, soluble in most organic solvents
Partition Coefficient (n-octanol/water): >3 (hydrophobic tendency)
Viscosity: Moderate to high
Auto-ignition Temperature: Over 300°C
Decomposition Temperature: Above 200°C, releasing sulfur oxides
Chemical Stability: Stable under recommended storage conditions
Incompatible Materials: Strong oxidizing agents, strong acids, bases, amines, moisture (leads to hydrolysis)
Conditions to Avoid: Exposure to heat, flames, sparks, light, and humidity
Hazardous Reactions: Hydrolysis forms ethanol and silanols; violent reaction with strong oxidizers possible
Decomposition Products: Silica, sulfur oxides, carbon oxides, organic fragments
Acute Toxicity: Estimated oral LD50 in rats >2000 mg/kg, minor irritation at low exposures
Skin Corrosion/Irritation: Prolonged contact can cause redness, itching, or chemical burns
Eye Damage/Irritation: Direct contact leads to tearing, redness, pain
Respiratory Sensitization: Short-term inhalation causes upper airway discomfort, chronic effects not well-studied for all formulations
Germ Cell Mutagenicity: No significant evidence in standard tests
Carcinogenicity: No classified carcinogens present
Reproductive Toxicity: No evidence of negative reproductive effects from available data
Repeated Dose Toxicity: Liver and kidney effects reported in high dose animal studies
Ecotoxicity: Harmful to fish and aquatic invertebrates, chronic exposure can impair ecosystem function
Persistence and Degradability: Poor water solubility, slow biodegradation, hydrolyzes to silanols and sulfides
Bioaccumulation Potential: Moderate, fatty tissues may retain residue over time
Mobility in Soil: Adsorbs to soil particles, limited vertical migration
Other Adverse Effects: Ethanol formed during use may impact aquatic organisms if improperly managed
Waste Treatment Methods: Incinerate under controlled conditions in licensed facility, do not release to environment, comply with local, state and national regulations
Container Disposal: Empty containers may retain product residue, triple rinse before disposal or recycling, do not re-use containers for food or beverage
Precautions for Disposal: Avoid contact of waste with surface and groundwater, always document waste handling
UN Number: UN 1993
UN Proper Shipping Name: Flammable liquid, n.o.s. (includes sulfur silane agent)
Transport Hazard Class: 3 (Flammable liquids)
Packing Group: III
Marine Pollutant: Yes
Required Labels: Flammable liquid, Environmentally hazardous
Special Precautions: Secure packaging to prevent leaks, segregate from oxidizers, limit exposure to heat during transport, provide material-specific emergency instructions to carriers
International Inventories: Listed on TSCA (USA), EINECS (EU), ENCS (Japan), AICS (Australia), DSL (Canada)
SARA Title III: Not classified as extremely hazardous
OSHA: Considered hazardous by definition, follow worker protection rules
EU Regulation: Comply with REACH registration if importing or producing in Europe
State Regulations: May be subject to state-specific chemical restrictions
Other Regulations: Complies with regulations governing safe transport of chemical goods, maintain updated SDS for users and emergency responders
