Product Name: 4-Hydroxybenzenesulphonic Acid
Synonyms: Para-Hydroxybenzenesulphonic Acid, p-Hydroxybenzenesulfonic Acid, Sulfanilic Acid Hydroxy Derivative
Chemical Formula: C6H6O4S
CAS Number: 98-67-9
Recommended Use: Dye intermediate, chemical synthesis, laboratory reagent
Manufacturer Details: Name, address, and contact information of the supplier
Emergency Contact: Local emergency telephone and poison control center info
GHS Classification: Eye irritation, Skin irritation, Specific target organ toxicity
Pictograms: Exclamation mark (irritant), Corrosive symbol
Signal Word: Warning
Hazard Statement: Causes serious eye and skin irritation; may cause respiratory discomfort if concentrations are high
Precautionary Statements: Avoid skin and eye contact, do not breathe dust or vapors, wear appropriate protective gear, wash thoroughly after handling
Potential Health Effects: Eye redness, pain; skin rash; throat irritation with inhalation
Environment Impact: Aquatic life hazard in high concentrations
Chemical Name: 4-Hydroxybenzenesulphonic Acid
Concentration: Purity typically ranges from 95% to 99%
Impurities: Sodium chloride, inorganic salts as minor components
Ingredient Limits: Not applicable for standard use unless specified by regulatory bodies
Eye Contact: Immediately rinse with water for 15 minutes; seek medical attention for remaining irritation
Skin Contact: Remove contaminated clothing; wash affected area with soap and water
Inhalation: Move to fresh air, monitor breathing, administer oxygen if breathing is difficult, seek medical advice if symptoms persist
Ingestion: Rinse mouth with plenty of water, drink water if conscious, medical attention recommended
Note to Physician: Treat symptomatically, no antidote available
Suitable Extinguishing Media: Dry chemical, CO2, water spray, foam
Specific Hazards: Produces sulfur oxides, carbon oxides on combustion
Protective Equipment for Firefighters: Wear full protective clothing, self-contained breathing apparatus
Thermal Decomposition Products: Sulfur dioxide, carbon monoxide, carbon dioxide
Firefighting Instructions: Cool exposed containers with water spray, contain run-off to prevent environmental damage
Personal Precautions: Use chemical splash goggles, gloves, and suitable clothing
Environmental Precautions: Prevent run-off into sewers, soil, surface or ground waters
Spill Clean-up Methods: Soak up with inert absorbent (sand, earth), place in suitable waste container, ventilate area
Decontamination: Wash contaminated surface with plenty of water
Handling: Use in a well-ventilated area, avoid dust and direct contact with skin or eyes, follow standard laboratory procedures
Storage: Store in cool, dry, well-ventilated place away from incompatible substances like strong oxidizers and alkalis
Storage Conditions: Keep container tightly closed, protect from heat and moisture, label all containers appropriately
Incompatibles: Strong bases, oxidizing agents, reducing agents, strong acids
Exposure Limits: No established OSHA or ACGIH exposure limits; minimize exposure
Ventilation Recommendations: Use local exhaust, general ventilation as appropriate
Personal Protective Equipment: Chemical resistant gloves, safety goggles, lab coat, NIOSH-approved respirator for dusty conditions
Eye Protection: Safety glasses with side shields or chemical splash goggles
Skin Protection: Gloves resistant to chemicals and solvents; use apron if risk of significant exposure
Hygiene Measures: Wash hands before eating, drinking, or smoking; remove contaminated clothing and wash before reuse
Appearance: White to light tan powder or crystalline solid
Odor: Slight, non-obnoxious
Melting Point: 79-82°C (174-179°F)
Boiling Point: Not sensitive, decomposes before boiling
Solubility: Soluble in water, limited solubility in alcohol and organic solvents
pH: 3.2 - 4.8 in 5% aqueous solution
Vapor Pressure: Negligible at ambient temperature
Density: About 1.66 g/cm3
Partition Coefficient: Not available
Flash Point: Not flammable
Auto-ignition Temperature: Data not available
Evaporation Rate: Non-volatile; negligible under typical conditions
Chemical Stability: Stable under ambient conditions, moisture sensitive at elevated temperatures
Possibility of Hazardous Reactions: Reaction with strong oxidizers may cause heat and explosive conditions
Conditions to Avoid: Excessive heat, humidity, incompatible chemicals
Hazardous Decomposition Products: Sulfur dioxide and carbon oxides on thermal breakdown
Incompatibles: Strong alkaline and oxidative materials
Routes of Exposure: Inhalation, skin contact, eye contact, ingestion
Acute Toxicity: Low acute toxicity to humans; oral LD50 (rat): 2000 mg/kg; inhalation and dermal toxicity are lower
Chronic Effects: No reliable data for chronic toxicity or carcinogenicity; repeated exposure can cause skin or eye irritation
Irritation: Causes redness and irritation to eyes, possible skin sensitization
Sensitization: Not a known respiratory sensitizer
Target Organs: Eyes, skin, respiratory tract
Eco-toxicity: Low to moderate risk for aquatic life in concentrated spills
Mobility in Soil: Readily soluble in water, moderate mobility in moist soil environments
Persistence and Degradability: Partially biodegradable under environmental conditions
Bioaccumulative Potential: Not likely to bioaccumulate due to water solubility
Other Adverse Effects: May cause temporary chemical changes in water bodies with large releases
Waste Disposal Methods: Dispose under federal, state and local regulations; incinerate or landfill in properly permitted facilities
Contaminated Packaging: Empty containers retain residue, treat as hazardous material; triple rinse, puncture, then recycle or landfill
Special Considerations: Do not discharge large quantities into drains, soil, or surface water; follow chemical waste protocols
UN Number: Not classified as a dangerous good under UN recommendations
ADR/RID: Non-hazardous
IMDG: Not regulated
IATA: Not restricted
Transport Label: No special labeling required
Packaging Requirements: Keep containers sealed, use chemical-resistant and labeled containers
Special Precautions: Avoid moisture and stacking with incompatible chemicals during transit
TSCA Status: Listed in U.S. Toxic Substances Control Act Inventory
EU Regulation: REACH compliant; not listed as a substance of very high concern
OSHA: Not specifically regulated
SARA Title III: Not listed as a hazardous substance
California Proposition 65: Not listed
Other Regulations: Ensure local regulations are followed in storage and disposal; comply with all applicable directives on chemicals and waste
