Product Name: N-Cyclohexylbenzothiazole-2-Sulfenamide
CAS Number: 95-33-0
Synonyms: CBS, Santocure CBS, Vulcanization Accelerator CBS
Molecular Formula: C13H16N2S2
Manufacturer: Listed on packaging or order sheet
Recommended Use: Rubber vulcanization accelerator
Contact Information: Emergency contact details are provided on the standard packaging, or check the supplier’s customer service info for rapid response.
UN Number: 3077 (for transport purposes)
Acute Hazards: Causes skin and eye irritation, may cause respiratory irritation and allergic reactions in sensitive individuals.
Toxicological Concerns: Harmful if swallowed or inhaled; potential for sensitization with repeated or prolonged exposures; some evidence of organ effects from repeated exposure.
GHS Classification: Acute Toxicity (Oral, Inhalation) – Category 4, Skin Sensitization – Category 1, Skin Irritation – Category 2, Eye Irritation – Category 2B
Signal Word: Warning
Precautionary Statements: Avoid breathing dust or fumes, wear gloves and eye protection, wash thoroughly after handling, use only outdoors or in a well-ventilated area, seek medical advice if you feel unwell.
Hazard Symbols: Exclamation mark, Health hazard
Main Ingredient: N-Cyclohexylbenzothiazole-2-Sulfenamide (Content: typically ≥ 95%)
Impurities: Trace amounts of related sulfenamides, benzothiazole, cyclohexylamine, typically <1% total
Other Information: No additional additives or stabilizers intentionally present as supplied.
Chemical Family: Benzothiazole derivatives
Eye Contact: Rinse immediately with running water for several minutes, lifting eyelids frequently; remove contacts if present, continue rinsing, get medical attention if irritation persists.
Skin Contact: Rinse skin with cool running water, remove contaminated clothing and shoes, wash with soap and water, seek medical help for persistent irritation or reaction.
Inhalation: Remove individual to fresh air, keep at rest, seek medical attention if symptoms develop (shortness of breath, cough, headache).
Ingestion: Rinse mouth, do not induce vomiting, seek medical advice immediately, provide product label or MSDS if possible.
Aggravated Conditions: Those with known chemical allergies or compromised skin protection should avoid direct contact or inhalation.
Suitable Extinguishing Media: Dry chemical powder, foam, CO2, water spray for larger fires.
Unsuitable Media: Direct streams of water may spread burning powder or dust.
Combustion Hazards: Toxic fumes of nitrogen oxides, sulfur oxides, benzothiazole compounds, and carbon oxides may emit under fire conditions.
Special Equipment: Firefighters need self-contained breathing apparatus and full gear.
Firefighting Tactics: Move containers from fire area if safe, dike runoff to minimize environmental exposure.
Explosion Risk: Avoid dust accumulation and static discharge sources.
Personal Protection: Wear protective gloves, goggles, dust mask or respirator, and work in a ventilated area.
Environmental Precautions: Prevent uncontrolled release to waterways, sewers, soil; block drains if powder spills.
Clean-Up Methods: Scoop up spills into containers using non-sparking tools, dispose of in line with local regulations, rinse area with water but avoid excessive runoff.
Spill Size Consideration: Large spills demand containment dikes and potentially negative-pressure ventilation.
Community Exposure: Notify nearby individuals or evacuation coordinator if significant quantity or dust becomes airborne.
Handling: Use with local exhaust or general room ventilation, avoid skin and eye contact, reduce dust generation, practice good industrial hygiene.
Storage: Store in dry, cool, and well-ventilated areas, away from direct sunlight, open flames, heat sources, acids, oxidizers, and food products.
Container Info: Reseal opened containers tightly, clear labeling recommended.
Transfer Techniques: Use anti-static equipment, minimize spills and airborne dust, keep containers closed.
Security: Access to storage areas limited to trained personnel.
Occupational Exposure Limits: No established OSHA, ACGIH, or NIOSH exposure limits; control exposures by engineering and personal controls.
Engineering Controls: Fume hoods or point-source exhaust, mechanical ventilation, enclosed systems.
Personal Protective Gear: Protective gloves (nitrile, neoprene), safety goggles, lab coat or approved suit, NIOSH-approved dust respirator in poorly ventilated or high-dust areas.
Hygienic Practices: Wash hands and face after handling, do not eat, drink, or smoke around material, remove contaminated clothing immediately.
Workplace Monitoring: Airborne dust measurements in high-use areas, skin monitoring for signs of sensitization.
Appearance: Off-white to light yellow crystalline powder.
Odor: Faint, characteristic amine odor
Melting Point: 95–99°C
Boiling Point: Decomposes before boiling
Vapor Pressure: Negligible at ambient conditions
Solubility: Insoluble in water, soluble in aromatic and chlorinated hydrocarbons
Density: 1.26–1.32 g/cm3 at 20°C
pH: Not applicable
Partition Coefficient (log P): Approx. 4
Evaporation Rate: Not applicable (solid product)
Stability: Chemically stable under recommended storage and usage conditions.
Hazardous Reactions: Avoid contact with strong oxidizers, acids, strong reducing agents, as exothermic reactions and hazardous thermal decomposition may arise.
Decomposition Risks: High temperatures produce sulfur oxides, benzothiazole derivatives, nitrogen oxides, and carbon-based residues.
Conditions to Avoid: Uncontrolled heat sources, open flames, direct sunlight, moisture ingress.
Polymerization: Not identified as a polymerization hazard.
Likely Routes of Exposure: Inhalation, skin and eye contact, ingestion very unlikely in workplace but possible via improper hygiene.
Acute Effects: Skin, eye, mucous membrane irritation; coughing; throat or respiratory system discomfort.
Chronic Effects: Repeated contact may produce skin sensitization, allergic reactions, or dermatitis.
Acute Oral Toxicity: LD50 (rat) 2830 mg/kg
Dermal Toxicity: No strong evidence for acute dermal toxicity at workplace exposure levels.
Sensitization: Recognized as a potential skin sensitizer.
Mutagenicity: Ames test shows low mutagenic potential.
Carcinogenicity: Not classified as carcinogen by IARC, NTP, OSHA.
Reproductive Effects: No well-documented evidence of reproductive toxicity in standard test systems.
Other Health Effects: Prolonged inhalation of dust may aggravate pre-existing skin or respiratory disorders.
Environmental Fate: Product not easily biodegradable; persistent under normal conditions.
Aquatic Toxicity: Moderately toxic to aquatic organisms; EC50 (Daphnia magna, 48 hr): approx. 2–10 mg/l.
Terrestrial Effects: Slow breakdown in soil, potential to accumulate if released consistently over time.
Bioaccumulation: Some potential for bioaccumulation due to log P value; caution warranted.
Mobility: Low in soil; chemical adheres to organic matter and sediments.
Other Concerns: Spillage near surface waters or drainage can result in toxic exposure to local aquatic life.
Safe Practices: Maintain strict procedures to prevent larger accidental releases into the environment.
Waste Treatment Method: Incineration at licensed chemical waste facilities preferred.
Waste Classification: Follow local, state, and federal standards; likely classified as hazardous chemical waste in most jurisdictions.
Packaging Disposal: Triple rinse empty containers, puncture or crush to prevent reuse, follow local regulatory agency guidelines.
Sewer Disposal: Never discharge product or contaminated rinse water into sewers, surface water, or groundwater.
Responsible Parties: Only qualified hazardous waste handlers or chemical waste facilities manage disposal.
Document Retention: Keep disposal records for regulatory and insurance needs.
UN Number: 3077
Proper Shipping Name: Environmentally Hazardous Substance, Solid, N.O.S. (Contains N-Cyclohexylbenzothiazole-2-Sulfenamide)
Hazard Class: 9 (miscellaneous dangerous substances)
Packing Group: III
Marine Pollutant: Yes
Transport Labels: Miscellaneous dangerous substance, environmentally hazardous
Special Precautions: Keep dry, protect packaging from breakage, comply with local and international transport regulations, ensure documentation and spill remediation equipment is available.
Global Inventories: Listed or notified in the United States TSCA, Canada DSL, European EINECS/ELINCS, China IECSC, Japan ENCS, Australia AICS, Korea ECL, Philippines PICCS.
Label Elements (GHS): Warning symbol (exclamation mark), skin and respiratory irritant, environmental hazard
U.S. Regulations: TSCA inventory status: listed, SARA 313: not listed, SARA 302: not listed, CERCLA RQ: not assigned, OSHA Hazard Communication Standard: hazardous chemical
European Union: REACH registration complete, subject to restrictions for use as an industrial intermediate;
Other Regions: Meets requirements in Japan, China, Korea, and Canada for industrial chemical use, not approved for food-contact applications.
Product-Specific Recommendations: Consult relevant regional authorities for guidance on environmental and workplace protection.
