Product Name: Di(Benzothiazol-2-Yl) Disulphide
Synonyms: MBTS; Dibenzothiazyl Disulfide; Vulcanization Accelerator MBTS
Chemical Formula: C14H8N2S4
Molecular Weight: 332.50 g/mol
CAS Number: 120-78-5
Recommended Use: Rubber accelerator, industrial chemical
Manufacturer/Supplier: Industry-standard chemical suppliers
Emergency contact: Refer to local poison control or emergency response center, always keep emergency contact sheet handy near storage locations
Address: Refer to onsite supplier information; keep material access records up to date at warehouses
Email/Phone: Maintain most recent contact details accessible at chemical storage or handling centers for efficient communication in case of incidents
Classification: Eye Irritant Category 2A, Skin Sensitizer Category 1B, Aquatic Chronic Toxicity Category 2
Hazard Statements: Causes serious eye irritation, may cause allergic skin reaction, toxic to aquatic life with long lasting effects
Signal Word: Warning
Pictograms: Exclamation mark, Environmental Hazard
Precautionary Statements: Wear eye protection, avoid skin contact, don’t release into waterways, wash hands thoroughly after handling, remove contaminated clothing and wash before reuse
Chemical Name: Di(Benzothiazol-2-Yl) Disulphide
CAS Number: 120-78-5
Concentration: >97% by weight
Impurities: Minor amounts of related benzothiazole compounds <2%
Other Ingredients: Dust suppression coatings <1% (if supplied in pellet or granulate form)
Inhalation: Move affected person to fresh air right away, loosen tight clothing, administer oxygen in case of breathing difficulty, get medical attention if symptoms persist
Skin Contact: Rinse skin thoroughly with plenty of soap and water, remove contaminated clothing, seek medical help if rash or irritation develops
Eye Contact: Rinse cautiously with water for at least 15 minutes, lift eyelids occasionally, remove contact lenses if present and easy to do, seek immediate medical advice if irritation persists
Ingestion: Rinse mouth with water, do not induce vomiting, drink water only if conscious, get immediate medical attention
Medical Attention: Treat symptomatically, no specific antidote noted in standard tox databases for this compound
Suitable Extinguishing Media: Dry chemical, foam, carbon dioxide, water spray (avoid direct high-pressure streams to prevent dust dispersion)
Hazardous Combustion Products: Sulfur oxides, nitrogen oxides, carbon monoxide, toxic benzothiazole fumes
Special Protective Equipment: Self-contained breathing apparatus with full protective gear
Fire & Explosion Hazards: Fine dust may form explosive mixtures with air under certain conditions; thermal decomposition yields toxic fumes
Firefighting Instructions: Avoid breathing smoke, evacuate unessential personnel, keep containers cool by spraying with water
Personal Precautions: Wear chemical-resistant gloves, safety goggles, dust mask or respirator if airborne dust is present, avoid skin contact
Environmental Precautions: Prevent runoff into drains, ditches, and waterways, use spill containment to collect residue and dust, inform local environmental authorities of large releases
Cleanup Methods: Scoop or vacuum up spilled material, place into well-labeled containers for disposal, avoid creating dust clouds, wash spill area with water and detergent after bulk removal
Handling: Use in well-ventilated areas, avoid dust formation, wear protective gear at all times, wash hands after handling, do not eat, drink or smoke during use, train personnel on proper handling procedures
Storage Conditions: Keep tightly closed in original container stored in a cool, dry, well-ventilated area away from direct sunlight, heat, strong acids or alkalis, and sources of ignition
Incompatible Materials: Strong oxidizing agents, acids, alkalis may cause decomposition or hazardous reactions
Special Requirements: Regularly inspect containers for leaks or damage, store away from foodstuffs or animal feeds, keep walkways and storage areas free from material buildup
Exposure Limits: No OSHA or ACGIH TLV established for this compound, good practice suggests keeping airborne dust concentrations below nuisance levels (total dust 15 mg/m³)
Engineering Controls: Local exhaust ventilation or process enclosures to minimize dust, use explosion-proof equipment where dust production expected
Personal Protective Equipment: Nitrile or neoprene gloves, chemical-resistant clothing, safety goggles or face shield, NIOSH-approved dust respirator
Hygiene Measures: Wash hands, face, and exposed skin thoroughly after handling, do not wear contaminated clothing outside work area, maintain eyewash stations and emergency showers
Appearance: Pale yellow or gray crystalline powder or granules
Odor: Faint rubbery or sulfurous odor
Boiling Point: Decomposes before boiling
Melting Point: 165-180°C
Flash Point: Not readily flammable under ambient conditions
Vapor Pressure: Negligible at room temperature
Solubility in Water: Insoluble
Solubility in Solvents: Slightly soluble in acetone, ethanol, benzene
pH: Not applicable (not soluble in water)
Density: 1.45-1.50 g/cm³
Partition Coefficient (log Kow): 4.0-4.5 (estimated)
Chemical Stability: Stable under normal handling and storage conditions
Conditions to Avoid: Excessive heat, sparks, open flames, moisture, strong acids or oxidizers
Incompatible Materials: Strong acids, oxidizing substances, alkalis
Hazardous Decomposition Products: Sulfur oxides, nitrogen oxides, benzothiazole derivatives, carbon monoxide
Polymerization: Not expected to occur under recommended transport or storage conditions
Acute Toxicity: Oral LD50 (rat) approx. 2500 mg/kg; low inhalation toxicity expected due to minimal vapor pressure; skin LD50 data limited but mild to moderate irritant
Skin Sensitization: May cause skin sensitization or allergic dermatitis on repeated exposure
Eye Contact: Causes significant irritation and redness, possible conjunctivitis
Inhalation Exposure: Dust may irritate respiratory tract, throat, and nose
Chronic Exposure: Repeated or prolonged exposure may affect liver function, based on animal studies; no human carcinogenic classification provided by IARC, NTP, or OSHA
Mutagenicity: No relevant mutagenicity noted in available standard studies, yet exposure minimization critical
Additional Effects: Possible links to delayed skin reactions, minor respiratory sensitivity in susceptible individuals
Toxicity to Aquatic Life: Toxic to fish and aquatic invertebrates (EC50 for Daphnia <1 mg/L)
Persistence/Degradability: Degrades slowly in soil and water, especially under low-oxygen conditions
Bioaccumulative Potential: Moderate to high potential for bioaccumulation in aquatic organisms (Log Kow >4)
Mobility in Soil: Low solubility means low mobility, but can adsorb to sediment and organic matter
Other Adverse Effects: Long-term threats to sediment-dwelling species and secondary toxicity up the food chain observed in monitoring studies
Safe Disposal: Dispose of in accordance with local, regional, and national regulations; incineration preferred due to slow degradation in landfills
Disposal of Packaging: Triple-rinse empty containers before recycling or disposal, do not reuse for other purposes, send rinsate for hazardous waste processing
Spill Residue: Collect using non-sparking tools, store in suitable closed containers for hazardous waste collection; avoid dust generation
Precautions: Never discharge to sewer, surface waters, or uncontrolled public landfills; coordinate with licensed hazardous waste contractors
UN Number: UN 3077
Proper Shipping Name: Environmentally Hazardous Substance, Solid, N.O.S. (Di(Benzothiazol-2-Yl) Disulphide)
Hazard Class: 9 (Miscellaneous Hazardous Material)
Packing Group: III
Transport Labels: Class 9, Marine Pollutant
Special Precautions: Keep dry, avoid mechanical shock, no mixed loading with foodstuffs or feed, update shipment papers with correct identification and emergency contacts
TSCA: Listed on US Toxic Substances Control Act Inventory
REACH (EU): Registered and subject to standard safety data reporting requirements
OSHA: Regulated as hazardous based upon acute toxicity and environmental classification
SARA Title III: Not listed as an Extremely Hazardous Substance under Section 302; reportable if thresholds exceeded under Section 313 (category: toxic chemicals)
Canadian DSL/NDSL: Listed on Domestic Substances List
Environment: Subject to restrictions and reporting under national water and air pollution legislation in multiple countries
Other Regulations: Check regional and site-specific requirements for workplace safety, storage, and emissions control
