Product Name: N Xylenesulfonic Acid
Chemical Family: Sulfonic acids
Synonyms: Methylbenzenesulfonic acid, Xylene sulfonic acid
CAS Number: 1300-72-7
Recommended Use: Used in chemical synthesis, catalyst applications, and surfactant production
Supplier Information: Manufacturer’s address and emergency contact phone numbers should be readily displayed on packaging and paperwork provided; supply chain transparency demands standard clarity.
Emergency Phone Number: Refer to product label or supplier’s literature for real-time assistance in a spill or exposure situation
GHS Classification: Corrosive to skin (Category 1B), Serious eye damage (Category 1), Acute toxicity (oral, Category 4)
Label Elements: Signal word: Danger; Pictograms: Corrosive, Exclamation mark
Hazard Statements: Causes severe skin burns and eye damage, may be harmful if swallowed, causes respiratory tract irritation
Precautionary Statements: Avoid breathing dusts or mists, wear protective gloves and eye protection, wash exposed skin after handling, use only outdoors or in well-ventilated areas
Potential Health Effects: Contact with skin or eyes causes pain, redness, burns, and possible tissue damage; inhaling dust leads to coughing and throat irritation; ingestion may result in burns to mouth, throat, and stomach
Environmental Hazard: Discharges affect aquatic organisms, causing both short-term and long-term damage
Chemical Name: N Xylenesulfonic Acid
CAS Number: 1300-72-7
Concentration: Typically >95% by weight
Impurities: May contain xylenes, toluene, sulfonated derivatives (<5%)
Molecular Formula: C8H10SO3
Molecular Weight: 186.23 g/mol
Eye Contact: Rinse affected eyes with water for at least 15 minutes, use fingers to hold eyelids apart, remove contact lenses if easy; seek immediate medical attention
Skin Contact: Remove contaminated clothing, rinse skin with copious amounts of running water for at least 15 minutes, call for medical treatment if irritation persists or blistering occurs
Inhalation: Move exposed person to fresh air at once, keep warm and at rest, monitor for signs of respiratory distress, give oxygen if trained, seek medical help
Ingestion: Rinse mouth thoroughly with water, do not induce vomiting, drink water to dilute and get medical attention at the earliest
Personal Protection for First Aiders: Use gloves, goggles, and chemical-resistant clothing; ensure area is ventilated; avoid mouth-to-mouth without barrier device
Suitable Extinguishing Media: Use water spray, alcohol-resistant foam, dry chemical powder, or carbon dioxide for firefighting
Unsuitable Extinguishing Media: Direct water jet may cause splattering and spread chemical
Specific Hazards: Heating releases sulfur oxides and toxic fumes, containers may rupture under prolonged exposure to fire or heat
Special Protective Equipment for Firefighters: Full protective suit and self-contained breathing apparatus required; approach from upwind side
Fire and Explosion Hazards: Sulfonic acids are non-combustible but react with metals, releasing flammable hydrogen gas
Personal Precautions: Avoid all contact with skin, eyes, and clothing; do not breathe vapors or mists; keep unprotected persons away; wear full personal protection equipment
Environmental Precautions: Prevent spillage from entering sewers, drains, watercourses; notify authorities if environmental contamination occurs
Cleanup Methods: Absorb with inert material such as sand, earth, or vermiculite; shovel into suitable containers for disposal; wash spill area thoroughly with water and detergent
Decontamination: Neutralize traces with dilute sodium carbonate, flush residues to controlled drainage system approved for acidic waste
Reporting Requirements: Report significant spills to local regulatory bodies for appropriate mitigation
Handling: Workers should use protective gloves, goggles, and acid-resistant clothing while managing the substance; use only in a chemical fume hood or well-ventilated area; avoid eating, drinking, or smoking during use; check process piping and connections for corrosion regularly
Storage: Store in tightly closed, clearly labeled, corrosion-resistant containers in a cool, dry, well-ventilated place; acids must be segregated from bases, oxidizers, and organic materials; avoid temperature extremes and direct sunlight
Transfer Precautions: Utilize dedicated lines and pumps for sulfonic acids; prevent leaks by close inspection and double-containment when feasible
Storage Area Features: Impervious flooring, acid-resistant coatings, proper drainage, and containment dikes or secondary containers
Exposure Limits: No established OSHA or ACGIH exposure limits for N Xylenesulfonic Acid, but refer to industry standards for acids
Engineering Controls: General room ventilation augmented by local exhaust at source, acid-resistant work surfaces
Personal Protective Equipment (PPE): Chemical goggles or full-face shield, acid-resistant gloves (butyl or neoprene recommended), long-sleeve acid-resistant apron or full coverall, proper footwear
Respiratory Protection: Certified acid vapor respirator if airborne concentrations are likely, use only when adequate ventilation cannot be achieved
Hygiene Measures: Wash thoroughly after handling and before eating or drinking; remove contaminated clothing and launder before reuse
Physical State: Liquid to solid crystalline substance, hydroscopic
Color: White to off-white
Odor: Pungent, characteristic of sulfonic acids
pH (1% solution): Strongly acidic, pH <1
Melting Point: 70-90°C (varies by isomer composition)
Boiling Point: Decomposes on heating
Relative Density: Approximately 1.3–1.5 (water = 1)
Solubility: Miscible with water, soluble in alcohol and many polar organic solvents
Vapor Pressure: Negligible at ambient temperature
Partition Coefficient (log Kow): Not applicable – highly ionized in aqueous solution
Viscosity: Moderate at ambient temperature
Flash Point: Not flammable
Auto-ignition Temperature: Not self-igniting
Explosive Properties: Not classified as explosive
Chemical Stability: N Xylenesulfonic Acid remains stable under recommended storage and handling conditions
Incompatible Materials: Reacts violently with bases (especially sodium and potassium hydroxide), strong oxidizers (such as peroxides and nitric acid), and some metals with gas evolution
Conditions to Avoid: High temperature, sunlight, moisture ingress; avoid mixing with incompatible substances
Hazardous Decomposition Products: Sulfur oxides (SO2, SO3), carbon monoxide, low-molecular-weight hydrocarbons
Polymerization: Will not occur under normal conditions of use and storage
Routes of Exposure: Eyes, skin, inhalation, ingestion
Acute Effects: Immediate pain, burning, ulceration upon skin or eye contact; respiratory symptoms after inhalation of dust; gastrointestinal distress if swallowed
Chronic Effects: Prolonged or repeated exposure may cause dermatitis, lung irritation, and possible long-term tissue damage to exposed areas
LD50 (Oral, Rat): Estimated 400–1000 mg/kg based on similar sulfonic acids
Carcinogenic Status: Not listed as a carcinogen by IARC, NTP, or OSHA
Mutagenicity/Teratogenicity: Studies limited; not expected from current data; handle with caution until more information develops
Sensitization: Not known to cause allergic reactions
Aquatic Toxicity: Toxic to aquatic organisms; possible long-term adverse effects in the aquatic environment
Persistence and Degradability: Biodegradable but rate varies; high concentrations alter pH of water bodies, inhibiting microbial activity
Bioaccumulation Potential: Unlikely due to water solubility and low partition coefficient
Soil Mobility: Highly soluble in water, can migrate through soil and contaminate groundwater
Other Effects: Large releases may harm fish, algae, and invertebrates due to rapid shift in pH and chemical reactivity
Product Waste: Treat as hazardous waste; neutralize with sodium carbonate prior to disposal if allowed; send for incineration at licensed chemical waste facility
Contaminated Packaging: Containers must be emptied of residues and rinsed, then managed as hazardous waste or according to local, state, or national regulations
Regulations: Adhere to EPA, RCRA, and local guidelines for acidic organic waste; never discharge to natural water systems
Waste Codes: US EPA Hazardous Waste Code D002 (corrosive waste); consult jurisdiction-specific codes
UN Number: UN2586
Proper Shipping Name: Xylenesulfonic Acid Solution or Xylenesulfonic Acid
Hazard Class: 8 (Corrosive Substances)
Packing Group: II
Marine Pollutant: Yes, subject to MARPOL 73/78 regulations
Labels Required: Corrosive (Class 8), Environmental Hazard where applicable
Special Provisions: Secure tightly; use corrosion-proof containers; emergency information to accompany shipment at all times
OSHA: Regulated as corrosive chemical under the Hazard Communication Standard
TSCA: Xylenesulfonic acid appears on the Toxic Substances Control Act Inventory
SARA Title III: Section 311/312: Immediate (acute) health hazard, Section 313: Not reportable
REACH (EU): Requires registration and compliance with member state reporting
Canada (DSL/NDSL): Present on Domestic Substances List
Other National or State Regulations: Check local environmental and safety rules for reporting, licensing, and emission control; maintain records of purchase, use, and disposal as demanded by authorities
