Material Safety Data Sheet for N-Cyclohexyl-2-benzothiazolesulfenamide (CBS/CZ)

Identification

Product Name: N-Cyclohexyl-2-benzothiazolesulfenamide, commonly known as CBS or CZ
Chemical Formula: C13H16N2S2
Synonyms: Cyclohexylbenzothiazole-2-sulfenamide, Rubber Accelerator CZ
CAS Number: 95-33-0
Recommended Use: Used mainly as a rubber accelerator in tire compounds and various technical rubber goods
Manufacturer or Supplier Contact: [Supply company contact information, including emergency phone number]
Emergency Telephone Number: [Emergency contact details]

Hazard Identification

Signal Word: Warning
GHS Classification: Skin sensitization (Category 1), Eye irritation (Category 2), Hazardous to the aquatic environment – chronic (Category 2)
Hazard Statements: Causes skin and eye irritation, may cause an allergic skin reaction, toxic to aquatic life with long-lasting effects
Pictograms: Exclamation mark, Environmental hazard
Precautionary Statements: Avoid breathing dust, avoid release to the environment, wear protective gloves, wash hands thoroughly after handling, use only outdoors or in a well-ventilated area

Composition / Information on Ingredients

Chemical Name: N-Cyclohexyl-2-benzothiazolesulfenamide
CAS Number: 95-33-0
Concentration: 96% or greater by weight
Impurities: Small amounts of benzothiazole and other secondary sulfenamides may be present
Additives: None intentionally added; product provided in technical grade for industrial use

First Aid Measures

Inhalation: Move exposed person to fresh air, keep comfortable, seek medical attention if symptoms like coughing or breathing difficulty develop
Skin Contact: Remove contaminated clothing, wash skin with soap and water, contact a physician if rash or irritation persists
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses if present, seek medical help if eye irritation continues
Ingestion: Rinse mouth, seek immediate medical assistance, do not induce vomiting unless told to by a healthcare professional
Most Important Symptoms: Skin sensitization, itching, redness, possible respiratory symptoms if inhaled

Fire-Fighting Measures

Suitable Extinguishing Media: Use foam, dry chemical, carbon dioxide, or water spray
Unsuitable Extinguishing Media: Direct stream of water can spread burning material
Specific Hazards: Burning produces smoke and irritating, toxic fumes including oxides of nitrogen and sulfur
Protective Equipment for Fire-Fighters: Wear self-contained breathing apparatus, chemical protective clothing
Special Procedures: Cool containers with water spray to prevent overheating; avoid runoff to waterways

Accidental Release Measures

Personal Protection: Use personal protective equipment, including gloves, safety goggles, and dust respirator
Environmental Precautions: Prevent from entering sewers or waterways
Methods for Containment: Sweep up bulk material without creating dust
Cleanup Practices: Place recovered material in correctly labeled containers for disposal, ventilate area; wash spill site after material pickup

Handling and Storage

Handling: Avoid dust formation and inhalation, handle with care, prevent skin and eye exposure, use local exhaust ventilation where possible
Storage: Store in sealed containers in a dry, cool, well-ventilated area, keep away from strong oxidizing agents, acids, and direct sunlight
Incompatible Materials: Strong acids, oxidizers
Storage Temperature: Keep below 25°C for best shelf life, avoid humidity

Exposure Controls and Personal Protection

Workplace Exposure Limits: No established US OSHA PEL, ACGIH TLV may be available for dust
Engineering Controls: Use local exhaust; keep dust below control limits 
Personal Protective Equipment: Safety glasses with side shields, impervious gloves (nitrile, neoprene), long-sleeved clothing, dust mask or NIOSH-approved respirator for powders
Hygiene: Wash hands after handling, remove and wash contaminated clothing, avoid eating/drinking during handling

Physical and Chemical Properties

Appearance: Off-white to pale yellow powder or granules
Odor: Faint, rubber-like, possibly sulfurous odor
pH: Not applicable in dry state
Melting Point: 96–112°C
Boiling Point: Decomposes before boiling
Flash Point: 192°C (closed cup)
Autoignition Temperature: 440°C 
Solubility: Insoluble in water, soluble in acetone and other organic solvents
Density: 1.28 g/cm³ at 20°C
Vapor Pressure: Not significant at ambient conditions

Stability and Reactivity

Chemical Stability: Stable under recommended handling and storage conditions
Conditions to Avoid: High temperature, direct sunlight, and moisture
Hazardous Reactions: Reacts with strong acids or oxidizing agents, decomposes at elevated temperatures
Decomposition Products: Nitrogen oxides, sulfur oxides, carbon monoxide, benzothiazole derivatives

Toxicological Information

Acute Toxicity: Oral LD50 (rat): approximately 2,630 mg/kg
Skin Corrosion/Irritation: May cause mild to moderate irritation; sensitization possible with repeated contact
Eye Damage/Irritation: May cause irritation
Respiratory Effects: Prolonged exposure to dust could cause respiratory irritation
Chronic Effects: Sensitization risk recognized, especially in repeated occupational exposures
Carcinogenicity: Not listed as a carcinogen by IARC, NTP, or OSHA
Mutagenicity and Reproductive Toxicity: No evidence to suggest mutagenic or reproductive effects at exposure levels typical in industrial settings

Ecological Information

Toxicity to Aquatic Life: Harmful to fish and aquatic invertebrates; long-term adverse impacts recognized in aquatic environments
Persistence and Degradability: Product shows limited biodegradability, may persist in sediment
Bioaccumulative Potential: Moderate, due to hydrophobic nature of compound
Mobility in Soil: Relatively immobile; binds to soil organic matter
Other Adverse Effects: Continuous release could cause damage to aquatic systems; minimize environmental discharge

Disposal Considerations

Recycling: Not typically recycled; consult regional, national, and local regulations
Waste Treatment: Incineration preferred, in compliance with local environmental authorities
Contaminated Packaging: Dispose of empty containers as hazardous waste, make sure any residue is handled properly
Precautions: Do not allow to contaminate water courses, avoid landfill disposal if prohibited

Transport Information

UN Number: Not regulated as a hazardous material for land, air, or sea transport
Proper Shipping Name: N-Cyclohexyl-2-benzothiazolesulfenamide
Transport Hazard Class: Not classified
Packing Group: Not assigned
Environmental Hazards: Not a marine pollutant under standard transport conventions; check local requirements
Special Precautions: Avoid mixing with incompatible substances during transit; use sealed and labeled packaging

Regulatory Information

US Regulations: Subject to TSCA inventory; not listed in SARA Section 313, CERCLA, or RCRA hazardous substances
EU Regulations: Reach registered, classified as hazardous to environment; subject to workplace safety directives
Canadian Regulations: Listed in DSL/NDSL
Label Requirements: GHS-compliant hazard pictograms, hazard and precautionary statements required on packing
Other Regulatory Information: Handling and waste management practices governed by local, regional, national, and international regulations; safety data sheets must always be available to personnel