Product Name: M Cresol 4-Acido Sulfonico Salt
Synonyms: 3-Methylphenol-4-sulfonic acid, sodium salt
CAS Number: 20765-98-0
Recommended Use: Used in dye and pigment manufacturing, chemical synthesis, and as an intermediate in organic processes.
Supplier Information: Major industrial chemical suppliers, chemical order fulfillment centers, industrial distributors with reach into the chemical, textile, and research sectors.
Emergency Contact: National chemical emergency numbers or local poison control centers; on-site supervisors maintain direct line numbers for rapid response needs.
Hazard Classification: Corrosive to metals, causes severe skin burns and eye damage, harmful to aquatic life with long-lasting effects.
Signal Word: Danger
Hazard Statements: Strong corrosive action on skin, mucous membranes, and eyes; vapors are irritating to respiratory tract; toxic by inhalation or ingestion.
Pictogram: Corrosion, exclamation mark, aquatic toxicity symbol under GHS standards.
Precautionary Statements: Prevent contact with eyes, skin, and clothing; avoid breathing vapors or dust; wear protective equipment; do not release to the environment.
Chemical Identity: 3-Methylphenol-4-sulfonic acid, sodium salt
Common Name: M Cresol sulfonic acid sodium salt
Concentration: 98% minimum active content
Impurities: Trace sodium sulfate, trace phenolic byproducts
Molecular Formula: C7H7NaO4S
Molecular Weight: 210.19 g/mol
CAS Number: 20765-98-0
Other Ingredients: Less than 2%—water, sodium chloride as stabilizer.
Inhalation: Move affected person to fresh air without delay; provide oxygen if breathing is difficult; seek medical attention for persistent symptoms.
Skin Contact: Immediately flush exposed skin with plenty of water for at least 15 minutes; remove contaminated clothing and shoes; seek medical help if irritation or burns develop.
Eye Contact: Rinse cautiously with water for several minutes; hold eyelids open and remove contact lenses; continue rinsing and get prompt medical attention.
Ingestion: Rinse mouth with water; do not induce vomiting; give several glasses of water; never give anything by mouth to an unconscious person; consult a physician urgently.
Notes for Physician: Treat symptomatically and supportively; monitor respiratory, renal, and hepatic function.
Suitable Extinguishing Media: Use water spray, dry chemical, foam, or carbon dioxide extinguishers.
Unsuitable Extinguishing Media: Direct water jet may spread hazard.
Special Hazards: Burns may produce sulfur oxides, phenolic vapors, carbon monoxide, and carbon dioxide.
Protective Equipment: Firefighters should wear full protective clothing and self-contained breathing apparatus.
Firefighting Instructions: Remove containers from fire area if safe; dike runoff to prevent entry into waterways; avoid inhaling combustion gases.
Personal Precautions: Wear full chemical-resistant clothing, goggles, face shields, and gloves; avoid inhalation of vapors and contact with skin.
Environmental Precautions: Prevent product from entering drains, sewers, and waterways; alert environmental authorities in accordance with local regulations.
Cleanup Methods: Neutralize with dilute base (e.g., sodium bicarbonate); soak up with inert absorbent material such as sand; collect in suitable closed containers for disposal.
Decontamination: Ventilate area, wash spill site after cleanup is complete, monitor area for residues.
Handling Precautions: Use only in a chemical fume hood or well-ventilated place; avoid creating dust or aerosols; avoid incompatible substances, especially strong acids and oxidizers.
Safe Storage: Store tightly sealed in labeled corrosion-resistant containers; maintain cool, dry, well-ventilated storage area; segregate from food, drinks, flammables, strong acids, and oxidizers; protect from direct sunlight and extreme temperature changes.
Special Protection: Use secondary containment to prevent accidental leaks or spills.
Hygiene Measures: Wash hands thoroughly after handling; do not eat, drink, or smoke in handling areas.
Occupational Exposure Limits: No OSHA PEL or ACGIH TLV assigned specifically; recommended to avoid all unprotected contact.
Engineering Controls: Local exhaust ventilation, closed system operations, eye wash stations, and emergency showers in working areas.
Respiratory Protection: NIOSH-approved respirators when engineering controls are inadequate or in case of accidental release.
Eye and Face Protection: Chemical splash goggles plus face shield.
Skin Protection: Chemical-resistant gloves (e.g., nitrile, butyl rubber), full protective suit, impervious boots.
Other Precautions: Remove and wash contaminated clothing before reuse; monitor air for vapor concentrations in enclosed spaces.
Appearance: Off-white to light brown crystalline or powdery solid.
Odor: Sharp, phenolic odor with sulfurous undertone.
pH (1% solution): 3.0 to 4.0
Melting Point: Approximately 240°C (decomposes)
Boiling Point: Above 300°C (decomposition occurs before boiling)
Solubility: Soluble in water, yields acidic solution; partially soluble in ethanol, insoluble in nonpolar solvents.
Vapor Pressure: Negligible at room temperature.
Density: 1.5–1.7 g/cm³
Partition Coefficient (Log Kow): Data not available.
Auto-Ignition Temperature: Not self-igniting under normal storage conditions.
Flash Point: Not applicable (non-volatile solid).
Chemical Stability: Stable in closed containers under recommended storage conditions.
Possible Dangerous Reactions: Reacts violently with strong oxidizing agents; corrosive to metals; can release toxic vapors at elevated temperatures or with acid contact.
Incompatible Materials: Acids (violent reaction, rapid decomposition), strong bases, oxidizers, aluminum, and certain plastics.
Hazardous Decomposition Products: Sulfur oxides, carbon monoxide, methylphenol vapors.
Conditions to Avoid: Humidity, high temperature, direct sunlight, improper segregation.
Routes of Exposure: Inhalation, skin absorption, ingestion, and eye contact.
Acute Toxicity: Corrosive effects dominate; significant tissue destruction on contact; ingestion causes burns of the mouth, throat, and stomach.
Chronic Effects: Prolonged or repeated exposure damages skin and respiratory tract; possible systemic toxicity from absorption.
Symptoms: Burning, redness, ulceration, coughing, pulmonary distress, headache, dizziness.
Sensitization: Not established.
Carcinogenicity: Not classified as carcinogenic by IARC, ACGIH, OSHA, or NTP.
Other Data: Not expected to cause genetic or developmental toxicity at normal levels, but protective limits apply due to corrosive nature.
Ecotoxicity: Harmful to aquatic organisms; may cause long-term adverse effects in aquatic environments.
Persistence and Degradability: Not readily biodegradable; mobile in soil, risk of contamination through water runoff.
Bioaccumulation Potential: Low to moderate—data lacking for specific species.
Mobility in Soil: Compound migrates through moist soil, raising groundwater pollution concerns.
Other Adverse Effects: Risk to microorganisms and higher aquatic life in event of spills.
Precautions: Always ensure containment, prevent uncontrolled releases.
Waste Disposal Methods: Collect residue in compatible, clearly labeled containers; treat as hazardous chemical waste.
Treatment: Do not discharge undiluted or neutralized waste to sewage systems; consult licensed waste disposal contractors.
Container Disposal: Deliver empty, rinsed containers to approved drum re-conditioners or incineration facilities.
Regulations: Adhere to local, state, and federal rules governing hazardous waste; alert landfill operators to contents.
UN Number: UN2585 (phenolsulfonic acid salt, solid)
Transport Hazard Class: 8 (Corrosive)
Packing Group: II
Labels: Corrosive
Special Precautions: Secure containers to prevent movement during transit; protect from physical damage and water; consult transport authorities if repackaging becomes necessary.
Transport By Land: Regulated for shipment by ground under ADR/RID and DOT.
Transport By Air: IATA–Cargo aircraft only, strong outer packaging, proper marking required.
Transport By Sea: IMDG code applies, appropriate stowage in dry, ventilated container.
TSCA Status: Listed on the U.S. Toxic Substances Control Act inventory.
REACH Registration: Registered or pre-registered under European REACH Regulation.
SARA Section 313: Not subject to Sara Title III Section 313 reporting.
OSHA Hazard: Meets criteria for hazardous chemical, subject to worker protection standard.
WHMIS Classification: Class E—Corrosive material (Canada).
Other Applicable Regulations: Subject to local chemical storage and reporting requirements; site-specific emergency planning and risk communication standards apply; consult regulations in country or state of usage for comprehensive requirements.
