Product Name: Benzimidazole-2-Thiol
Synonyms: 2-Mercaptobenzimidazole, MBzT
Chemical Formula: C7H6N2S
CAS Number: 583-39-1
Recommended Use: Chemical research, rubber vulcanization accelerator, pharmaceuticals
Manufacturer: Include name, address, and emergency contact phone
Emergency Contact: National chemical safety hotline, local poison control number
GHS Classification: Acute toxicity (oral, dermal, inhalation), Skin sensitizer, Eye irritant
Hazard Statements: Harmful if swallowed, Contact causes skin irritation and sensitization, Serious eye irritation, Toxic to aquatic life
Pictograms: Exclamation mark, Health hazard, Environment
Signal Word: Warning
Precautionary Statements: Avoid breathing dust or vapors, Wash hands thoroughly after handling, Wear protective gloves and eye protection, Do not eat, drink or smoke during use, Dispose of contents and container in accordance with local regulations
Potential Health Effects: Headache, nausea, dermatitis, respiratory irritation
Chemical Name: Benzimidazole-2-Thiol
Purity: Typically >99%
Impurities: Unspecified trace organics, water content analyzed per batch
Molecular Weight: 150.20 g/mol
Inhalation: Remove to fresh air, seek medical advice if symptoms remain, provide oxygen if breathing feels labored
Skin Contact: Remove contaminated clothing, wash skin with plenty of water and mild soap, seek medical attention for persistent discomfort
Eye Contact: Rinse eyes gently with water for at least 15 minutes, remove contact lenses, consult healthcare provider
Ingestion: Rinse mouth, do not induce vomiting, call poison control or doctor immediately, provide water only if victim is alert
Symptoms: Redness, blistering, allergy-like sensitivity, GI distress upon ingestion, respiratory discomfort
Suitable Extinguishing Media: Use water spray, alcohol-resistant foam, carbon dioxide, or dry chemical powder
Unsuitable Media: Direct water jet, avoid spreading material
Specific Hazards: May release toxic gases like nitrogen oxides, sulfur dioxide during combustion
Protective Equipment: Wear full protective gear, use self-contained breathing apparatus
Firefighting Procedures: Cool exposed containers with water spray, prevent runoff from entering waterways, eliminate ignition sources
Personal Protection: Use chemical-resistant gloves, safety goggles, protective clothing, NIOSH-approved respirator for dust
Environmental Precautions: Prevent entry into drains, sewers, soil, and open water
Containment: Cover powder spills with damp cloth or inert absorbent, avoid dust formation, scoop into labeled container
Cleanup Method: Gather into sealable, leak-proof containers for safe disposal, ventilate area thoroughly, wash contaminated surface with soap and water
Handling: Wear protective gear during all stages, avoid generating dust, steer clear of skin or eye contact, never eat or drink around substance, practice good personal hygiene
Storage: Keep container tightly closed in a dry, cool, and well-ventilated location, segregate from incompatible acids, strong oxidizers
Special Precautions: Label storage location, restrict unauthorized access, minimize air and moisture exposure, regularly inspect containers for leaks
Exposure Limits: No established OSHA PEL or ACGIH TLV for MBzT, but aim for minimal exposure
Engineering Controls: Operate inside fume hood or local exhaust, maintain good room ventilation
Respiratory Protection: NIOSH/MSHA-approved dust respirators during dust-generating operations
Hand Protection: Nitrile rubber gloves or chemically resistant material
Eye Protection: Safety goggles or face shield
Protective Clothing: Lab coat, closed-toe shoes, long sleeves
Hygiene Measures: Wash hands before breaks and after shift, launder contaminated clothing before reuse
Appearance: Off-white or light yellow powder
Odor: Slight sulfur-like smell
pH: Not applicable
Melting Point: 300-305°C (decomposes)
Boiling Point: Not available; decomposes
Flash Point: Not available
Solubility: Insoluble in water, soluble in ethanol and organic solvents
Vapor Pressure: Negligible at room temp
Density: Approx. 1.42 g/cm³
Partition Coefficient (log Kow): No data available
Auto-ignition Temperature: Data not reported
Chemical Stability: Stable under standard conditions, sensitive to high temperature and moisture
Conditions to Avoid: Strong heat, direct sunlight, high humidity, open flame
Incompatible Materials: Strong acids, strong oxidizing agents, bases
Hazardous Decomposition Products: Nitrogen oxides, sulfur oxides, carbon oxides
Polymerization: No hazardous polymerization expected
Routes of Exposure: Inhalation, ingestion, skin and eye contact
Acute Toxicity: LD50 (oral-rat): ~600 mg/kg; dermal toxicity data limited
Chronic Effects: Repeated exposure linked to skin sensitization, possible allergic contact dermatitis
Carcinogenicity: No IARC, ACGIH or NTP listing
Reproductive Toxicity: No conclusive animal/human data
Target Organs: Skin, eyes, respiratory tract
Symptoms: Redness, sneezing, rash, GI upset
Aquatic Toxicity: Harmful to fish and aquatic organisms, LC50 (fish, 96 hr): <10 mg/L
Persistence and Degradability: Slow biodegradation in nature, potential long-term soil accumulation
Bioaccumulation Potential: Not expected to bioaccumulate significantly due to low water solubility
Mobility in Soil: Low mobility, binds to particulate matter, unlikely to leach into groundwater
Other Adverse Effects: Avoid uncontrolled release, can disrupt aquatic food chains if uncontained
Disposal Methods: Treat as hazardous chemical waste, incinerate in licensed facility if possible, landfilling only in accordance with regulatory approval
Container Disposal: Triple-rinse, puncture, and send to approved waste handler; empty packaging treated as chemical-contaminated
Precautions: Prevent entry to waterways, avoid disposal in municipal sewer system, contact local hazardous waste agency for detailed instructions
UN Number: Not assigned for MBzT
DOT (U.S.): Not regulated as dangerous by road
IMDG (Maritime): Not marine pollutant under standard quantities but avoid transport with strong oxidizers
ICAO/IATA (Air): Not regulated under normal conditions, pack securely and ensure inner seals
Transport Precautions: Use original packaging, secure containers, keep away from foodstuffs and feed, mark as “Chemical, not regulated” unless quantities or local rules trigger stricter handling
U.S. Regulations: Not listed under TSCA inventory chemical substances subject to SNUR, no CERCLA reporting requirements
Europe (REACH): May not require registration for research quantities, consult supplier
OSHA Right-to-Know: Included on many chemical inventory lists, label and train workers on hazard class
Canada WHMIS Classification: D2B (Toxic), proper workplace labeling
Other Regulations: Local, regional, and country legislation may impact handling, storage, and disposal; maintain updated SDS with shipping documents
