Material Safety Data Sheet (MSDS): P-Nitrobenzoic Acid (PNBA)

Identification

Product Name: P-Nitrobenzoic acid
Chemical Name: 4-Nitrobenzoic acid
Synonyms: Para-Nitrobenzoic Acid, p-Nitrobenzoate
Molecular Formula: C7H5NO4
Molecular Weight: 167.12 g/mol
CAS Number: 62-23-7
Recommended Use: Laboratory chemicals, manufacturing of dyes, pharmaceuticals
Supplier Information: Check label or contact your distributor for name and address
Emergency Contact Number: Available on container or through local chemical safety network

Hazard Identification

GHS Classification: Acute Toxicity (Oral, Dermal), Eye Irritation Category 2, Skin Irritation Category 2
Pictograms: Exclamation mark symbol for caution
Signal Word: Warning
Hazard Statements: Causes skin irritation, causes serious eye irritation, harmful if swallowed, may cause respiratory irritation
Potential Health Effects: Inhalation may cause coughing, sore throat, or difficulty breathing; skin contact may produce redness or irritation; ingestion can result in abdominal pain, vomiting, or diarrhea

Composition / Information on Ingredients

Chemical Identity: P-Nitrobenzoic acid
Concentration: 99% or higher
Chemical Formula: C7H5NO4
Impurities: Trace elements dependent on supplier; review product certificate of analysis for more information
Other Components: None intentionally added

First Aid Measures

Inhalation: Move person to fresh air, keep comfortable for breathing, seek medical attention if symptoms persist
Skin Contact: Remove contaminated clothing, rinse skin with water for 15 minutes, wash with soap and water, obtain medical care for persistent effects
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses if present and easy to do, seek medical advice immediately if irritation persists
Ingestion: Rinse mouth, do not induce vomiting, call poison center or physician, provide symptomatic support
Important Symptoms: Redness, pain, irritation, coughing, difficulty breathing, stomach discomfort

Fire-Fighting Measures

Suitable Extinguishing Media: Water spray, dry chemical powder, foam, carbon dioxide
Unsafe Extinguishing Media: Avoid using water jets directly on burning material
Specific Hazards: Heating may cause hazardous decomposition products such as nitrogen oxides or carbon oxides
Protective Equipment: Firefighters should wear self-contained breathing apparatus and full protective clothing
Special Procedures: Move containers from fire area if safe, cool containers exposed to flames with water spray from a distance

Accidental Release Measures

Personal Precautions: Evacuate area, use appropriate personal protective equipment such as gloves, goggles, and mask
Environmental Precautions: Prevent spill from entering drains, watercourses, or soil
Clean-Up Methods: Sweep up without creating dust, place in clearly labeled container for disposal, ventilate area, clean with soap and water
Reference to Other Sections: Refer to exposure controls and disposal considerations section for protective handling and waste guidelines

Handling and Storage

Safe Handling Advice: Avoid contact with skin and eyes, avoid inhalation of dust, use in a well-ventilated area, keep containers tightly closed
Technical Measures: Use corrosion-resistant containers, prevent static discharge, ground all equipment
Storage Conditions: Store in cool, dry, and well-ventilated area, protect from heat and moisture, store away from incompatible materials such as strong oxidizers, bases, or reducing agents
Storage Temperature: Maintain ambient room temperature unless otherwise specified by supplier
Specific End Use: For laboratory and industrial applications only

Exposure Controls and Personal Protection

Exposure Limits: No Occupational Safety and Health Administration (OSHA) limits established; keep dust and particulate below recommended exposure guidelines
Engineering Controls: Use local exhaust ventilation, enclosures, and dust extraction to control airborne contaminants
Personal Protective Equipment: Wear approved chemical splash goggles, compatible gloves (nitrile or neoprene recommended), long-sleeve laboratory coats, closed-toe shoes, and, if necessary, a particulate respirator
Hygiene Measures: Wash hands, face, and other exposed skin thoroughly after handling, remove contaminated clothing and wash before reuse, do not eat, drink, or smoke in handling area

Physical and Chemical Properties

Appearance: Yellow crystalline solid
Odor: Slightly acrid or pungent
Odor Threshold: Not available
pH: Slightly acidic in water
Melting Point: Around 240–242 °C (464–467 °F)
Boiling Point: Decomposes before boiling
Flash Point: Not applicable
Evaporation Rate: Not applicable
Solubility in Water: Sparingly soluble
Solubility in Other Solvents: Slightly soluble in ethanol, ether
Vapor Pressure: Negligible
Relative Density: 1.62 g/cm³
Partition Coefficient (log Pow): Not determined
Autoignition Temperature: Not available
Decomposition Temperature: Above 240 °C
Viscosity: Not applicable (solid)

Stability and Reactivity

Chemical Stability: Stable under normal storage conditions
Reactivity: Not expected to be reactive under recommended handling
Conditions to Avoid: Open flame, excessive heat, hot surfaces, direct sunlight
Incompatible Materials: Strong oxidizing agents, strong bases, reducing agents
Hazardous Decomposition Products: Nitrogen oxides (NOx), carbon monoxide, carbon dioxide
Hazardous Polymerization: Will not occur under normal conditions

Toxicological Information

Likely Routes of Exposure: Inhalation, skin and eye contact, ingestion
Acute Toxicity: Low to moderate toxicity, LD50 (oral, rat) typically in the range of 1960 mg/kg
Skin Corrosion/Irritation: Can cause mild to moderate irritation
Eye Damage/Irritation: May cause significant irritation and redness
Respiratory Sensitization: Dust can cause irritation to mucosal passages
Chronic Effects: Repeated exposure may cause dermatitis, respiratory discomfort
Carcinogenicity: Not listed as a carcinogen by IARC, NTP, or OSHA
Other Data: Insufficient evidence for mutagenicity, teratogenicity, or reproductive toxicity in available studies

Ecological Information

Environmental Effects: May be harmful to aquatic life, especially with long-term exposure
Persistence and Degradability: Not readily biodegradable in the environment, can persist in water and soil
Bioaccumulative Potential: Expected to have low bioaccumulation in aquatic organisms
Mobility in Soil: Low mobility, tends to bind to sediments or soil particles
Other Adverse Effects: Avoid release to waterways, due to potential long-term adverse effects on aquatic ecosystems

Disposal Considerations

Waste Handling: Collect and transfer to properly labeled chemical waste container
Methods of Disposal: Consult local, regional, or national regulations for approved disposal methods, usually incineration or landfill with hazardous waste controls
Contaminated Packaging: Dispose of containers as hazardous waste, ensure decontamination before recycling or reuse, never reuse unwashed packaging
Special Precautions: Avoid dispersal of dust, avoid release into the environment, always use personal protective equipment during handling of waste

Transport Information

UN Number: Not classified for transport as dangerous goods
Proper Shipping Name: P-Nitrobenzoic acid
Transport Hazard Class: Not regulated
Packing Group: Not assigned
Environmental Hazards: Not classified as marine pollutant
Transport Label: No specific labeling required, keep tightly closed and upright to avoid spills
Special Precautions for User: Secure secondary containment during transport, avoid physical shocks, keep away from food and drink

Regulatory Information

TSCA Inventory: Listed
REACH Registration: Pre-registered or fully registered within the EU, details available from supplier
OSHA Hazard Communication: Classified hazardous material; communicate hazards to staff with access to safety information
SARA Title III Sections 302/304/311/312/313: Not subject to reportable quantities, but always record and report large releases to appropriate authorities
Other Regulations: Subject to local, state, and national safety laws for use, storage, and disposal
Labeling Requirements: Use appropriate GHS labeling on all secondary containers, spell out specific hazard and precautionary statements