Product Name: Benzenesulphonic Acid
Chemical Formula: C6H6O3S
Synonyms: Benzene Sulfonic Acid, Benzenesulfonic Acid
CAS Number: 98-11-3
Manufacturer: Contact local supplier or chemical distributor
Recommended Use: Laboratory reagent, intermediate for detergents, dyes, and pharmaceuticals
Emergency Telephone Number: Local poison control center or emergency chemical response
Classification: Corrosive, causes severe skin burns and eye damage
Label Elements: Danger symbol (corrosive), hazard and precautionary statements
Potential Health Effects: Irritation to skin, eyes, and respiratory tract, may cause burns and severe irritation, inhalation can produce coughing, shortness of breath, and chest pain
Target Organs: Eyes, skin, respiratory system
Environmental Hazards: Harmful to aquatic life, risk of environmental contamination
Chemical Name: Benzenesulphonic Acid
Concentration: 98-100%
Impurities: Typically minor, may include sulfonated by-products depending on production route
Molecular Weight: 158.17 g/mol
Inhalation: Remove from exposure area, move to fresh air, seek medical attention quickly
Skin Contact: Rinse thoroughly with water for minimum of 15 minutes, remove contaminated clothing, medical examination required
Eye Contact: Immediate irrigation with plenty of water for 15 minutes, prompt medical attention recommended
Ingestion: Rinse mouth, do not induce vomiting, seek immediate medical help
Suitable Extinguishing Media: Water spray, dry powder, foam, carbon dioxide; avoid direct water stream
Specific Hazards: May decompose under fire conditions, producing toxic gases such as sulfur oxides and carbon oxides
Special Protective Equipment: Chemical-resistant suits, goggles, gloves, positive-pressure self-contained breathing apparatus
Firefighting Advice: Approach with caution, limit exposure to fumes and thermal decomposition products, cool surrounding containers
Personal Precautions: Use full protective gear including gloves, goggles, and face protection; avoid inhalation and skin contact
Environmental Precautions: Prevent runoff from entering drains, waterways, or soil
Methods for Cleanup: Neutralize with lime or sodium carbonate, absorb spilled liquid with inert material, collect in suitable labeled drum for disposal, ventilate and wash spill area after cleanup
Safe Handling: Work in well-ventilated area, avoid skin and eye contact, do not breathe fumes, wash after handling
Storage Conditions: Store in cool, dry, well-ventilated place, acid-resistant containers with tight closures, segregate from incompatible materials like bases and oxidizers
Incompatibilities: Strong bases, oxidizers, reducing agents, reactive metals (aluminum, zinc)
Exposure Limits: No specific limits established in most jurisdictions, maintain to lowest feasible exposure using engineering controls
Engineering Controls: Local exhaust ventilation, closed system operations, emergency eyewash and shower stations nearby
Personal Protective Equipment: Chemical splash goggles, acid-resistant gloves and apron, full face shield for splash risk, NIOSH-approved respirator for airborne exposure potential
Appearance: Oily, colorless to pale yellow liquid or crystals
Odor: Slightly aromatic
Melting Point: 43-49 °C
Boiling Point: 288–290 °C
Solubility: Miscible in water, soluble in alcohol
Density: 1.36–1.37 g/cm³
pH: Strongly acidic in solution
Vapor Pressure: Low at room temperature
Flash Point: Above 170 °C (closed cup, may vary by purity)
Chemical Stability: Stable under recommended storage and use conditions
Conditions to Avoid: Heat, ignition sources, moisture, incompatible materials
Hazardous Reactions: Violent reaction with strong bases, can react with metals releasing hydrogen; fires produce sulfur oxides and organic vapors
Decomposition Products: Sulfur dioxide, carbon monoxide, carbon dioxide
Acute Toxicity: Oral LD50 (rat) approx. 500 mg/kg causing burns to mucous membranes
Skin Corrosion/Irritation: Severe irritation, burns, redness, prolonged contact leads to necrosis
Eye Damage: Causes severe irritation, burns, may lead to blindness
Inhalation Effects: Coughing, shortness of breath, respiratory tract damage
Chronic Exposure: Dermatitis, possible corneal injury, no evidence of carcinogenicity
Other Data: Sensitization not reported, mutagenicity and teratogenicity data lacking
Aquatic Toxicity: Harmful to aquatic organisms even at low concentrations, risk of bioaccumulation is low due to rapid hydrolysis
Persistence and Degradability: Degrades slowly in water, forms benign sulfate ions and phenols if treated
Soil Mobility: Mobile, can move through soil to groundwater
Ecotoxicity: Fish: LC50 (48h) 79 mg/L, aquatic invertebrates susceptible to lower doses
Other Effects: Acidic runoff can damage vegetation and aquatic ecosystems
Waste Treatment Methods: Neutralization using alkaline materials (lime, sodium carbonate), collect residue as hazardous waste
Disposal Containers: Use tightly sealed, labeled acid-resistant drums
Disposal of Packaging: Rinse containers thoroughly, treat rinse with waste, follow local regulations
Regulatory Requirements: Consult local, regional, national guidelines for disposal
Shipping Name: Benzenesulphonic Acid
UN Number: 2585
Hazard Class: 8 (Corrosive substance)
Packing Group: III
Labeling: Corrosive symbol, emergency handling instructions, keep away from foodstuffs and incompatible materials
Transport Precautions: Secure containers against puncture, prevent movement or tipping, ventilate cargo area
Workplace Regulations: OSHA/NIOSH do not list specific limits for benzenesulphonic acid, control as for corrosive substances
Environmental Regulations: Subject to Spill Reporting (CERCLA, SARA Title III in the US), listed as hazardous under various state and international laws
Hazard Symbols: GHS corrosive, harmful to environment pictograms
Other Requirements: Safety training, hazard communication program, regular review and updating of safety procedures
Restriction of Use: Not for consumer use; handle only by trained personnel in accordance with relevant regulations
