Product Name: Mixture of Bis[3-(Triethoxysilyl)Propyl]Tetrasulfide and Carbon Black
Chemical Formula: C18H42O6S4Si2 (tetrasulfide component), C (carbon black component)
Synonyms: Silane Coupling Agent and Reinforcing Carbon Black Blend
Manufacturer: Contact supplier for details
Recommended Use: Rubber compounding, tire manufacturing, industrial fillers
Restrictions on Use: Not for direct human or animal consumption, not suitable for food or medical applications
Emergency Contact: Accompanying technical service or local fire department hotline
Classification: Flammable solid, skin irritant, eye irritant, toxic to aquatic life
Signal Word: Warning
Hazard Statements: May cause skin and eye irritation, respiratory tract irritation possible, may produce combustible dust clouds, harmful to aquatic organisms with long lasting effects
Precautionary Statements: Avoid breathing dust, use personal protective equipment, wash thoroughly after handling, avoid release to environment
Pictograms: Exclamation mark, environment (fish/tree), flame
Routes of Exposure: Inhalation, skin contact, eye contact
Bis[3-(Triethoxysilyl)Propyl]Tetrasulfide: 50%, CAS Number: 40372-72-3
Carbon Black (Amorphous): 50%, CAS Number: 1333-86-4
Impurities: Trace amounts of ethanol (from hydrolysis), residual silanes
Toxic Components: May contain bounded polycyclic aromatic hydrocarbons below regulated thresholds
Eye Contact: Rinse immediately with plenty of water for several minutes, remove contact lenses if present and safe to do, continue rinsing
Skin Contact: Wash with soap and water, remove contaminated clothing, seek medical attention if irritation persists
Inhalation: Move to fresh air, keep at rest, seek medical advice if symptoms develop or persist
Ingestion: Do not induce vomiting, rinse mouth with water, obtain medical advice if feeling unwell
Suitable Extinguishing Media: Carbon dioxide, dry chemical, foam, water spray (avoid direct water jet to prevent dust dispersion)
Specific Hazards: May emit toxic fumes of carbon oxides, sulfur oxides, and silicon oxides on combustion
Protective Equipment for Firefighters: Self-contained breathing apparatus, full protective gear, avoid inhaling vapors and combustion byproducts
Explosion Hazards: Fine dust clouds may present risk of explosion, properly ventilate areas where dust accumulates
Personal Precautions: Wear suitable protective clothing, dust masks, eye protection, avoid dust formation
Environmental Precautions: Prevent further leakage or spillage if safe, do not discharge to drains or waterways
Methods for Cleanup: Sweep up or vacuum spilled material carefully and place in suitable, labeled containers for disposal, avoid creating dust cloud, ventilate affected area, clean area thoroughly after material removal
Handling: Use in well-ventilated areas with local exhaust to control airborne dust, minimize contact with skin and eyes, avoid dust generation, keep container tightly closed when not in use
Storage: Store in a cool, dry, well-ventilated space away from sources of ignition, segregate from strong oxidizers and acids, use containers with tight seals to prevent moisture ingress, protect from static discharge and incompatible materials
Occupational Exposure Limits: ACGIH TLV for carbon black 3.5 mg/m³ (inhalable fraction), manufacturer’s OEL for silane not established
Engineering Controls: Handle only with adequate local exhaust ventilation, enclosed processes preferred, prevent dust accumulation on surfaces
Personal Protective Equipment: Chemical-resistant gloves (nitrile or neoprene), safety goggles, long-sleeved protective clothing, respiratory protection (N95 or P100 for dust or mist), industrial hygiene practices recommend no eating, drinking, or smoking in handling areas
Appearance: Fine black powder
Odor: Faint, sulfurous solvent odor
pH: Not applicable
Melting Point/Freezing Point: Decomposes on heating, softening above 180°C without clear melting
Boiling Point/Range: Not determined, but tetrasulfide decomposes before boiling
Flash Point: >150°C (closed cup, tetrasulfide component)
Flammability: Dust may ignite in air, not bulk flammable
Vapor Pressure: Negligible at standard conditions
Solubility: Insoluble in water, dispersible in organic solvents such as toluene or ethanol
Density: Approx. 1.5–1.7 g/cm³
Partition Coefficient (log Pow): Not measured for mixture
Chemical Stability: Stable at room temperature under normal use conditions, degrades under acidic or hot alkaline environments
Reactivity: Reactive with strong oxidizing agents, acids, and bases
Hazardous Reactions: Generates sulfur-containing gases on decomposition, thermal decomposition may produce silicon dioxide and carbon monoxide
Conditions to Avoid: Exposure to moisture, high temperatures, static discharge, open flames, and incompatible materials
Incompatible Materials: Strong oxidizers, acids, flammable solvents, peroxides
Hazardous Decomposition Products: Carbon oxides, silicon oxides, sulfur oxides, ethanol vapors in presence of water/humidity
Acute Toxicity: Low acute toxicity by inhalation or oral routes records show LD50 (oral, rat) >3000 mg/kg (tetrasulfide), carbon black not acutely toxic
Irritation/Corrosivity: Skin and eye irritant based on animal studies and experience with similar materials
Respiratory Effects: Inhalation of dust may lead to pulmonary irritation, worsening of chronic respiratory conditions possible
Carcinogenicity: Carbon black classified by IARC as Group 2B (possibly carcinogenic to humans, by inhalation of dust)
Mutagenicity: No evidence from standard mutagenicity tests (Ames test)
Reproductive Toxicity: No relevant data for the mixture at reported concentrations
Target Organ Effects: Prolonged excessive exposure could affect respiratory system and skin
Aquatic Toxicity: Moderately toxic to aquatic life based on bis[3-(triethoxysilyl)propyl]tetrasulfide LC50 (fish, 96 hr): 10–100 mg/L range, carbon black is persistent but has low mobility
Persistence and Degradability: Silane component hydrolyzes slowly, carbon black is persistent and does not degrade readily
Bioaccumulation Potential: Low for silane, negligible for carbon black
Mobility in Soil: Low due to insolubility in water
Other Effects: Fine dust may physically affect aquatic organisms, no known significant ozone depletion potential
Waste Disposal Methods: Dispose of contents and container in accordance with national and local regulations, typically as non-hazardous solid industrial waste unless contaminated
Contaminated Packaging: Rinse thoroughly, recycle or send to suitable landfill or incineration facility
Special Cautions: Do not discharge into drains, surface water, or groundwater systems, use approved waste contractors, keep documentation for waste transfer and manifest as required by local authority
UN Number: Not regulated for transport as a dangerous good under UN, ADR, IATA, IMDG based on composition, consult specific shipment regulations
Transport Hazard Class: Not classified
Packing Group: Not assigned
Environmental Hazards: Not classed as marine pollutant
Special Precautions for User: Avoid generating dust during loading or unloading, use dust-tight and secure packaging, label in compliance with workplace and national requirements
US TSCA Status: All components listed
EU REACH Status: Pre-registered or registered
Labeling under GHS/CLP: Warning symbol (exclamation mark, environment), hazard codes H315, H319, H335, H411
Other Regulations: Carbon black listed under NIOSH and OSHA as a particulate hazard, local regulations may apply for air emission controls and workplace exposure
National Inventories: Listed in most major chemical inventories (DSL, ENCS, EINECS)
SARA 313: Not a listed substance but consider local reporting thresholds for carbon-based particulates
Workplace Hazards: Not classed as highly hazardous, require standard industrial hygiene and safety controls
