Product Name: Xylenolsulfonic Acid
Chemical Formula: C8H10O4S
Synonyms: Xylenol Sulphonic Acid, Xylenol Sulfonic Acid
Recommended Use: Industrial chemical, dye manufacturing, surfactant production, resin catalyst
Manufacturer: Contact local supplier or manufacturer for detailed company information
Emergency Contact Number: Refer to label or Safety Department line
Classification: Corrosive to metals, Skin corrosion/irritation (Category 1A), Serious eye damage (Category 1)
Label Elements: Danger, corrosive pictogram, exclamation mark
Hazard Statements: Causes severe skin burns, serious eye damage, may cause respiratory irritation, harmful if swallowed
Precautionary Statements: Do not breathe dust or mists, wash thoroughly after handling, use personal protection, avoid release to the environment
Other Hazards: Contact with water may generate heat, reacts vigorously with bases and oxidizing agents, emits toxic fumes if heated
Chemical Name: Xylenolsulfonic Acid
CAS Number: 25321-41-9
Concentration: 70–100%
Impurities: Trace substituted xylenol compounds, possible inorganic salts
Other Ingredients: May contain water in small quantities as stabilizer
Inhalation: Remove person to fresh air, keep comfortable for breathing, seek medical attention if symptoms occur
Skin Contact: Immediately remove contaminated clothing, rinse skin with ample water or shower for at least 15 minutes, obtain medical advice
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses if present, seek immediate medical care
Ingestion: Rinse mouth, do not induce vomiting, drink plenty of water if conscious, call doctor or poison center right away
Most Important Symptoms: Severe burns, pain, redness, blistering, respiratory discomfort
Note to Physician: Treat symptomatically, consider delayed pulmonary edema for significant inhalation exposure
Suitable Extinguishing Media: Use foam, dry chemical, carbon dioxide, or water spray
Unsuitable Extinguishing Media: Direct water stream can cause splatter
Specific Hazards: Emits toxic fumes including sulfur oxides and phenolic vapors during combustion
Protective Equipment for Firefighters: Full turnout gear, self-contained breathing apparatus
Special Firefighting Procedures: Cool containers exposed to fire with water spray, contain run-off to prevent environmental contamination
Personal Precautions: Evacuate area, ensure adequate ventilation, wear chemical splash goggles, acid-resistant gloves, rubber boots, full coveralls
Environmental Precautions: Prevent spilled material from entering sewers, drains, or natural waterways, use spill containment dikes
Methods for Clean Up: Absorb with inert dry material such as clay, collect and place in covered chemical waste container, neutralize residual acid with sodium carbonate or lime, ventilate area
Other Information: Decontaminate tools and surfaces, dispose according to local regulation
Safe Handling Advice: Handle in chemical fume hood or well-ventilated environment, avoid generation of mist, do not eat, drink, or smoke when using
Technical Measures: Use corrosion-resistant equipment, perform regular leak checks on containers and valves
Storage Conditions: Store in original containers, tightly closed, in a cool, dry, well-ventilated area away from direct sunlight and incompatible chemicals
Incompatible Materials: Strong bases, oxidizers, reducing agents, metals
Special Storage Requirements: Store on acid-resistant shelves, use secondary containment trays
Exposure Limits: No established OSHA or ACGIH exposure limits for xylenolsulfonic acid, but minimize exposure due to corrosivity
Engineering Controls: Local exhaust or dilution ventilation, acid scrubbers if large volumes handled, eye wash and safety showers required
Personal Protective Equipment: Chemical splash goggles, acid-resistant gloves (nitrile or neoprene), full-face shield, long pants and sleeves, acid apron, respiratory protection if ventilation is not adequate
Hygiene Measures: Wash hands before breaks and after handling, change contaminated clothes immediately, do not reuse contaminated workwear
Appearance: Oily, colorless to light yellow liquid
Odor: Phenolic, pungent
Odor Threshold: Not available
pH: Strongly acidic (≤1, solution in water)
Melting Point/Freezing Point: Below 0°C (depends on concentration)
Boiling Point: Decomposes above 200°C
Flash Point: Not flammable
Evaporation Rate: Not volatile
Flammability: Not flammable
Vapor Pressure: Low at ambient temperature
Vapor Density: Not determined
Relative Density: 1.2–1.3 at 20°C
Solubility: Completely soluble in water
Partition Coefficient (n-octanol/water): Not determined
Auto Ignition Temperature: Not self-igniting
Decomposition Temperature: Above 200°C
Viscosity: Viscous
Chemical Stability: Stable under recommended handling and storage conditions
Possible Hazardous Reactions: Reacts exothermically with bases, reactive metals (aluminum, zinc), forms hydrogen gas, contact with chlorates or nitrates can cause oxidation reactions
Conditions to Avoid: Heat, open flames, contact with incompatible materials
Materials to Avoid: Strong alkalies, strong oxidizers, reducing agents
Hazardous Decomposition Products: Sulfur oxides, phenolic vapors, carbon oxides
Acute Toxicity: Oral LD50 (rat): >2000 mg/kg (estimated), significant corrosivity limits testing
Skin Corrosion/Irritation: Causes severe skin burns
Serious Eye Damage/Irritation: Causes severe eye damage, risk of permanent injury
Respiratory or Skin Sensitization: Not classified as sensitizer, but vapor or mist may irritate respiratory tract
Repeated Dose Toxicity: Prolonged exposure may cause dermatitis, respiratory effects
Carcinogenicity: Not listed as carcinogenic by IARC, NTP, or OSHA
Mutagenicity: No data available
Reproductive Toxicity: Not determined, avoid exposure
Other Data: Repeated or prolonged exposure increases risk for tissue damage
Ecotoxicity: Harmful to aquatic life, causes low to moderate acute toxicity to aquatic organisms
Persistence and Degradability: Slow environmental degradation, persistent in water unless neutralized, not readily biodegradable
Bioaccumulative Potential: Not expected to bioaccumulate due to high solubility in water
Mobility in Soil: High mobility in aqueous systems due to solubility; risk to groundwater if released
Other Adverse Effects: Acidification of local watercourses, possible long-term ecological impacts from repeated spills
Waste Treatment Methods: Neutralize with dilute sodium carbonate under controlled conditions, dilute further with water, send resulting solution to chemical effluent treatment plant
Disposal of Contaminated Packaging: Rinse thoroughly, dispose of according to local hazardous waste regulations
Special Precautions: Never dispose untreated product into sewage, ensure complete neutralization before final disposal
Relevant Legislation: Follow local, regional, and national regulations
UN Number: 2584
UN Proper Shipping Name: Xylenolsulfonic acid solution
Transport Hazard Class: 8 (Corrosive substances)
Packing Group: II
Marine Pollutant: Not classified as a marine pollutant
Special Transport Precautions: Ensure containers are undamaged, upright, clearly labeled, emergency response information available during transport, protect from physical damage and exposure
OSHA: Regulated as a hazardous chemical
TSCA: Listed on Toxic Substances Control Act inventory
SARA Title III: Subject to reporting requirements in case of significant release
REACH (EU): Registration required for import or manufacture in the European Union, substance of concern for environmental hazard
Other Local/Regional Regulations: Classified as hazardous waste under RCRA, subject to transport and workplace labeling requirements, consult local environmental protection agencies for further requirements
