Product Name: Bis-(3-Triethoxysilane Propyl)-Tetrasulfide and Carbon Black Mixture
Common Names: Silane coupling agent blend, Tetrasulfidosilane-carbon composite
Recommended Uses: Used mainly as a reinforcing additive in rubber compounding and tire manufacturing
Supplier: Industrial chemical provider, contact for details
Emergency Phone: Local emergency contact number or CHEMTREC
Manufacturer Address: Production facility location, available upon request
Classification: Flammable liquid category 4, Skin irritation category 2, Eye irritation category 2A, Specific Target Organ Toxicity (Single Exposure), Acute aquatic toxicity
Signal Word: Warning
Hazard Statements: Causes skin and eye irritation, may cause respiratory irritation, flammable if exposed to ignition source, may be harmful to aquatic life with long lasting effects
Precautionary Statements: Do not handle without proper ventilation, avoid skin and eye contact, do not breathe dust or vapors, avoid release to the environment
Pictograms: Corrosive, Exclamation mark, Environmental hazard
Bis-(3-Triethoxysilane Propyl)-Tetrasulfide: 30–50% by weight, CAS No. 40372-72-3
Carbon Black: 40–60% by weight, CAS No. 1333-86-4
Other Components: Trace stabilizers, residual solvents, process aids (less than 1%)
Impurities: Sulfur-containing residuals, unreacted silane fractions, exact quantities available in technical data sheets
Ingredient Disclosure: No known ingredients classified as carcinogenic by OSHA in the stated concentrations
Inhalation: Move affected individual to fresh air immediately, maintain comfortable upright position, seek medical attention if coughing, shortness of breath, or irritation occurs
Skin Contact: Remove contaminated clothing, wash skin thoroughly with soap and water, do not use solvents to clean skin, seek medical help if redness or blistering develops
Eye Contact: Rinse eyes gently with running water for at least 15 minutes, hold eyelids apart, remove contact lenses only if easily possible, call for medical advice if symptoms persist
Ingestion: Rinse mouth but do not induce vomiting, drink small amounts of water if conscious, get medical attention immediately
Important Symptoms: Airway irritation, chemical burns, delayed respiratory symptoms possible after significant exposure
Suitable Extinguishing Media: Dry chemical powder, foam, carbon dioxide, do not use water jet as it may spread fire
Specific Hazards: Combustion can release irritating or toxic fumes, including sulfur oxides, silica particulates, incomplete combustion residues
Protective Equipment: Full set of fire-fighting gear including self-contained breathing apparatus, chemical resistant boots and gloves, use positive pressure if possible
Firefighting Advice: Move containers from fire area if it can be done safely, cool exposed surfaces with water spray, avoid inhalation of smoke and fumes
Personal Precautions: Use appropriate respiratory protection, avoid contact with spilled material, restrict access to area for unprotected personnel, avoid generating dust
Environmental Precautions: Contain spillage to prevent entry into drains and watercourses, avoid contributing to environmental contamination
Spill Cleanup: Collect spill using non-sparking tools, clean residue with absorbent material, dispose in accordance with safety protocols
Emergency Procedures: Notify relevant authorities if large scale spill threatens public safety or the environment
Precautions for Safe Handling: Use only in well-ventilated areas, avoid breathing vapors and dust, use protective gloves, face protection, ensure transfer equipment is grounded to prevent static discharge
Hygiene Practices: Wash hands and face after handling, do not eat or drink in handling areas
Storage Conditions: Store in tightly closed containers, keep away from heat and direct sunlight, segregate from incompatible substances such as strong oxidizers
Shelf Life and Stability: Stable under recommended storage conditions, avoid prolonged exposure to moisture and air which may degrade silane functionality
Exposure Limits: ACGIH TLV for Carbon Black is 3.5 mg/m³, no established TLV for silane compound, NIOSH REL for Carbon Black is 3.5 mg/m³
Engineering Controls: Local exhaust ventilation, process enclosures, mechanical ventilation as needed
Personal Protective Equipment: Chemical resistant gloves (nitrile or neoprene), safety goggles or face shield, flame-resistant work clothing, suitable respirators in poorly ventilated settings
Hygiene Measures: Wash exposed skin areas thoroughly after contact, maintain rigorous housekeeping to minimize dust accumulation
Appearance: Fine black powder or granules, may appear as dust-laden material
Odor: Slight sulfur smell, faint alcohol-like undertone from silane
Odor Threshold: Not determined
pH Value: Not applicable (solid mixture)
Melting Point / Freezing Point: Above 200°C (Carbon Black), -40 to 0°C estimated for silane
Boiling Point: Decomposes before boiling
Flash Point: Around 100°C for silane compound
Flammability: Moderate static ignition risk, can create combustible dust-air mixtures
Vapor Pressure: Very low at room temperature
Solubility: Insoluble in water (Carbon Black); silane is hydrolyzable
Density: Close to 1.1–1.5 g/cm³
Partition Coefficient: Not available
Decomposition Temperature: Silane decomposes above 240°C, Carbon Black is thermally stable up to 500°C
Other Physical Data: Dust generation common during handling, surface area and particle size affect reactivity
Reactivity: Stable under ambient conditions, increased reactivity with oxidizing agents
Chemical Stability: Maintains stability in well-sealed packaging, sensitive to moisture over time
Hazardous Reactions: Exothermic reactions with peroxides and acids yield sulfur oxides, unstable in strong acidic or basic environments
Hazardous Decomposition Products: Ethanol, sulfur dioxide, silicon oxides, carbon monoxide, minor organic decomposition by-products
Conditions to Avoid: Prolonged heat, open flames, static discharges, strong acids or bases, excessive dust dispersion
Likely Routes of Exposure: Inhalation of dust or vapor, skin contact especially at handling points, incidental ingestion
Acute Toxicity: Respiratory irritation likely, skin irritation can develop with large-area contact, eye discomfort common, ingestion may cause gastrointestinal symptoms
Chronic Effects: Prolonged inhalation of Carbon Black dust can contribute to pulmonary issues, repeated skin exposure to silane compounds can cause dermatitis, chronic respiratory irritation possible in unventilated workplaces
Carcinogenicity: IARC classifies Carbon Black as possibly carcinogenic to humans (Group 2B), silane compound not classified by OSHA, IARC, or EU
Sensitization and Other Effects: No strong evidence for allergic sensitization, consult medical provider if unusual symptoms develop
Ecotoxicity: Carbon Black does not break down easily in the environment, can have adverse effects on aquatic organisms through chronic exposure, silane breakdown products can increase silica in water systems
Mobility in Soil: Both components display low mobility, tend to bind strongly to particulate matter
Persistence and Degradability: Carbon Black stable over long timeframes, biopersistence is high, silane hydrolyzes and forms non-biodegradable siloxanes
Bioaccumulative Potential: No significant bioaccumulation known for finished rubber goods, some risk exists for Carbon Black in sediment
Other Adverse Effects: Contributes particulate pollution if released in bulk, runoff should not enter storm drains or open water without treatment
Waste Treatment Methods: Dispose of as hazardous industrial waste in accordance with local, state, and federal regulations, incineration preferred where available
Recommendations: Collect residues in sealed, labeled containers, avoid creating airborne dust during cleanup, do not flush to drain
Packaging Disposal: Triple rinse or otherwise decontaminate containers before recycling or disposal, comply with supplier’s end-of-life procedures
Other Instructions: Report large disposals as required by regulatory mandates, document all waste handling steps
UN Number: May not have a specific UN designation, refer to local shipping codes for mixtures containing silanes
Proper Shipping Name: Environmentally hazardous substance solid, n.o.s. (based on composition)
Transport Hazard Class: Class 9 (miscellaneous hazardous materials)
Packing Group: III (for lower hazard but regulated substances)
Transport Labels: Environmentally hazardous substance, miscellaneous hazard
Special Precautions for Transport: Protect packages from rough handling, avoid cargo shift, keep away from food and feedstuffs during shipment
Safety, Health, and Environmental Regulations: Chemical mixture regulated under OSHA Hazard Communication Standard, Carbon Black listed by TSCA, REACH, EINECS
Labelling Requirements: Appropriate GHS pictograms, signal words, and precautionary statements on all containers
SARA Title III (Sections 302/311/312/313): No components present in sufficient quantity to require reporting under typical thresholds
State Regulations: Subject to additional labeling and handling requirements in jurisdictions such as California (Proposition 65 for Carbon Black exposure)
International Inventories: All major components listed on or exempt from relevant chemical inventories in the US, Canada, EU, and major Asian markets
