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Chemical Name: p-Toluenesulfonic anhydride
Common Synonyms: Ts2O, 4-Methylbenzenesulfonic anhydride
CAS Number: 80-66-6
Appearance: White to off-white crystalline solid, sometimes slightly clumpy
Odor: Weak or no detectable odor
Hazard Classification: Eye and respiratory irritant, corrosive to skin, can cause burns
Risk Phrases: Can lead to respiratory discomfort, burning sensation on skin, risk of serious damage to eyes
Safety Phrases: Avoid direct contact, use in ventilated setting, always wear basic personal protection
Routes of Exposure: Dust inhalation, eye or skin contact common in lab settings
Precautionary Statements: Use with care, not in areas with poor ventilation, do not touch eyes after handling
Main Component: p-Toluenesulfonic anhydride, purity often above 99% in lab stocks
Impurities: Traces of p-Toluenesulfonic acid possible, especially if storage not bone-dry
Molecular Formula: C14H14O5S2
Molecular Weight: 326.39 g/mol
Eye Contact: Rinse with plenty of clean water, hold eyelids apart, seek medical help without delay
Skin Contact: Wash affected area with soap and water, remove contaminated clothing, get medical attention if burns develop
Inhalation: Move outside or to fresh air immediately, loosen clothing, seek medical care if cough or difficulty breathing follows
Ingestion: Rinse mouth with water, avoid vomiting, never try to give fluids to someone not fully alert, call for professional medical support
Suitable Extinguishing Media: Carbon dioxide, dry chemical powder, alcohol-resistant foam
Unsuitable Extinguishing Media: Avoid water streams that can spread contamination
Special Hazards: Decomposes under strong heat to toxic fumes: sulfur oxides, toluene vapors
Protective Equipment: Wear full-body fire gear, self-contained breathing apparatus
Firefighting Tactics: Approach from upwind, keep run-off contained, ventilate judiciously
Personal Precautions: Avoid breathing dust, keep people away, ventilate area, wear gloves and eye protection
Spill Clean-up: Scoop up crystals with minimum dust, use inert absorbent like vermiculite for fine powder, collect for hazardous waste disposal
Environmental Precautions: Prevent from washing into drains, watch for contact with water sources
Cleanup Advice: Sweep gently, wipe residue with damp (not wet) cloths, double-bag all waste for chemical waste stream
Handling: Avoid touching face or eyes after handling, use within fume hood in schools or industry, never eat or drink nearby
Safe Storage: Seal containers airtight, store in cool, dry spot, segregate from water, acids, oxidizers
Other Storage Tips: Keep walkways clear, label containers with date opened, do not store above shoulder height
Engineering Controls: Keep hoods running, use glove boxes for sensitive manipulations, monitor air for dusty conditions
Personal Protection: Safety goggles, acid-resistant gloves, lab coat required; avoid contact lenses
Hygiene Tips: Wash hands after leaving lab bench, swap gloves frequently in case of puncture or seepage
Respiratory Protection: If dust unavoidable, wear well-fitting dust mask or use P100 respirators for larger spills
State/Appearance: Crystalline solid, sometimes forms clumps
Color: Typically white or faintly yellow
Boiling/Melting Point: Melts between 100-110°C, decomposes before boiling
Solubility: Slowly hydrolyzes in water, soluble in aprotic solvents like acetonitrile, unstable in moist air
Density: About 1.4 g/cm3 (practical value, varies with clumping)
Other Notes: Strong dehydrating nature, reacts vigorously with water
Stability: Stable in sealed, dry conditions; absorbs water fast and decomposes to toluenesulfonic acid
Incompatible Materials: Water, strong bases, strong oxidizing agents, acids
Reactivity: Generates heat and corrosive fumes with water, releases toluene upon strong heating
Hazardous Decomposition: Sulfur oxides, toluene, possible acidic vapors on burning or decomposition
Acute Effects: Causes burning, redness, or pain on contact; inhalation irritates respiratory lining, triggers coughing
Chronic Effects: Prolonged or repeated contact can worsen dermatitis
Routes of Entry: Most problems stem from dust inhalation or splash to eyes/skin
Sensitization: Not commonly noted by major agencies, but corrosive properties make it risky
LD50 Estimates: Limited direct data; related sulfonic compounds show moderate toxicity on ingestion or inhalation
Environmental Fate: Hydrolyzes to p-toluenesulfonic acid, which is water-soluble and can be persistent in aquatic systems
Persistence/Degradability: Organic sulfonic acids can last in water and soil, resist simple breakdown
Aquatic Toxicity: Expected to cause harm to aquatic species at higher concentrations; no verified eco-tox data for anhydride itself
Other Environmental Hazards: Accidental spill can acidify small water bodies, impact microbial communities in soil
Waste Handling: Gather contaminated solids, avoid mixing with household trash, label as hazardous organic chemical
Recommended Disposal: Submit waste and wipes to chemical hazardous waste collection, never burn or flush
Container Disposal: Triple-rinse, puncture, and label empty bottles, send to hazardous waste stream
Practical Tip: Seek advice from local hazardous waste handler, never try to neutralize with tap water
Transport Regulations: Chemically regulated under most international battery, corrosive organic solid shipping rules
Packing Group: Usually Group II or III for corrosive hazard
Shipping Precautions: Keep container tightly sealed, mark as corrosive solid, avoid combined loads with acids or oxidizers
Transport Labeling: Use "corrosive" hazard diamond, ensure emergency information accompanies cargo
Chemical Inventory Listing: Listed in most national chemical inventories, including TSCA and REACH
Worker Protection: Covered under OSHA corrosive substance rules; eye wash and emergency shower must be on hand
GHS Classification: Corrosive to eyes and skin; hazard pictograms and warning statements required
Community-Right-to-Know: Some localities require reporting usage or spills above threshold quantities
Labeling: Strong warnings on secondary containers, plain language recommended for handling instructions in workplace
