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Product Name: P-Aminobenzoic Acid
Chemical Formula: C7H7NO2
CAS Number: 150-13-0
Synonyms: 4-Aminobenzoic Acid, PABA
Recommended Use: Intermediate in organic synthesis, sunblock ingredient, pharmaceutical applications
Supplier: Chemical manufacturers and suppliers
Emergency Contact: Local poison control center or occupational health expert
Classification: Irritant to skin and eyes, potential allergen, may cause respiratory irritation
Hazard Statements: Causes eye irritation, causes skin irritation, may cause allergic skin reaction, may cause respiratory tract irritation
Signal Word: Warning
Precautionary Phrases: Avoid breathing dust or fumes, wash skin thoroughly after handling, wear protective gloves and eye protection, in case of inadequate ventilation use respiratory protection
Potential Health Effects: Short-term exposure can cause redness, itching, or rash on skin, eye contact may result in pain and tearing, inhalation of dust may lead to nose or throat discomfort, repeated handling can trigger allergic reactions in sensitive individuals
Chemical Name: P-Aminobenzoic Acid
Purity: Typically > 98%
Impurities: Trace organic and inorganic contaminants may be present
Inhibitors or Additives: No additional stabilizers or inhibitors used
EC Number: 205-753-0
Inhalation: Move person to well-ventilated area, support breathing as needed, seek medical advice if discomfort continues
Skin Contact: Immediately wash affected area with plenty of water and mild soap, remove contaminated clothing, seek further attention if irritation persists
Eye Contact: Rinse cautiously with water for at least 15 minutes, hold eyelids apart to ensure thorough flushing, remove contact lenses if easy, contact a physician if symptoms continue
Ingestion: Rinse mouth with water, never induce vomiting unless directed by medical personnel, seek prompt medical evaluation
Suitable Extinguishing Media: Use water spray, dry chemical powder, foam, or carbon dioxide for small fires
Hazardous Combustion Products: Burning may release nitrogen oxides, carbon monoxide, carbon dioxide, and toxic fumes
Protective Equipment: Firefighters should wear self-contained breathing apparatus and protective gear
Special Precautions: Avoid inhaling smoke and fumes, keep run-off water out of water sources and sewers, ensure adequate ventilation
Explosion Risk: Dust can form explosive mixtures with air in rare conditions, control sources of ignition
Personal Precautions: Evacuate non-essential personnel, wear suitable PPE including gloves, goggles, and mask, avoid breathing dust
Spill Containment: Prevent entry into drains, sewers, or water sources, contain spillage with inert absorbent material
Cleaning Methods: Carefully collect and place spilled material in clearly labelled waste containers, ventilate area, wash contaminated surfaces with water and detergent
Disposal: Dispose of waste as hazardous chemical in accordance with local environmental regulations
Handling: Avoid generating dust, use in well-ventilated areas, wear PPE to reduce skin or eye contact, wash hands thoroughly after use
Storage Conditions: Store in tightly closed containers, keep in cool and dry place, protect from direct sunlight and moisture, avoid storage near strong oxidizing agents
Special Considerations: Inspect containers regularly for leaks, ensure area is designated for chemical storage, maintain safety equipment nearby
Exposure Limits: No specific occupational exposure limits have been set, general nuisance dust threshold may apply
Engineering Controls: Use exhaust ventilation or fume hood, ensure appropriate eyewash and safety shower stations are accessible
Personal Protective Equipment: Wear impervious gloves and chemical splash goggles, select clothing to prevent skin contact, use NIOSH-approved mask in dusty environments
Hygiene Measures: Do not eat, drink, or smoke in work area, wash thoroughly after handling, remove contaminated clothing before leaving workplace
Appearance: White to slightly yellow crystalline powder
Odor: Odorless
Molecular Weight: 137.14 g/mol
Melting Point: 186–189°C
Boiling Point: 298.5°C (decomposes)
Solubility: Slightly soluble in water, soluble in alcohol and ether
Vapor Pressure: Negligible at room temperature
pH: 3.5–4.0 (solution in water)
Density: 1.374 g/cm³
Flash Point: Not easily flammable
Other Properties: Stable under recommended storage conditions, compatible with most common laboratory chemicals
Chemical Stability: Stable under normal conditions of temperature and pressure
Possibility of Hazardous Reactions: Contact with strong oxidizers may result in violent reaction, avoid exposure to strong acids and bases
Conditions to Avoid: High temperatures, moisture, sources of ignition
Decomposition Products: Heating or combustion may release toxic nitrogen oxides, carbon monoxide
Acute Toxicity: Oral LD50 for rats around 2000 mg/kg; can cause discomfort if ingested in large amounts
Irritation: May cause skin and eye irritation; repeated contact may lead to dermatitis in sensitive individuals
Allergy Sensitization: Some cases of allergic contact dermatitis reported; not known to cause asthma
Chronic Effects: Prolonged exposure could affect liver or kidney function in lab animals; limited evidence for humans
Other Effects: Not classified as carcinogenic, mutagenic, or toxic to reproduction by major health agencies
Ecotoxicity: Low toxicity to aquatic life at typical environmental levels
Persistence and Degradability: Expected to degrade in soil and water under aerobic conditions
Bioaccumulation: Not likely to bioaccumulate significantly in wildlife
Mobility: Moderately mobile in soil, can leach to groundwater if spilled in large quantities
Waste Treatment Methods: Collect in sealed containers, label as hazardous chemical, send to licensed disposal contractor
Regulatory Disposal Requirements: Follow all local, regional, and national regulations for disposal of chemicals
Precautions: Do not dump chemicals into sewers or waterways, prevent environmental contamination by securing waste appropriately
UN Number: Not classified as dangerous for transport
Proper Shipping Name: P-Aminobenzoic Acid
Transport Hazard Class: Not regulated
Packing Group: Not applicable
Special Precautions: Avoid breaking containers during transit, transport in accordance with ADR, IMDG, or IATA guidelines where applicable
US TSCA: Listed
EU REACH: Registered
Hazard Symbols: Xi (Irritant)
Risk Phrases: R36/37/38 (Irritating to eyes, respiratory system, skin)
Safety Phrases: S24/25 (Avoid contact with skin and eyes)
Other Regulatory Notes: Not listed as a controlled substance, observe all chemical hygiene and worker safety laws
