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Chemical Name: 2-Naphthylamine
Synonyms: 2-Aminonaphthalene
Chemical Formula: C10H9N
Appearance: Light brown, tan, or white solid, may yellow with age
Odor: Weak amine-like scent
Common Uses: Dye manufacture, laboratory research
CAS Number: 91-59-8
Molecular Weight: 143.19 g/mol
Classification: Carcinogen, toxic if inhaled or swallowed, skin irritant, toxic to aquatic life
Routes of Exposure: Inhalation, ingestion, skin contact, eye contact
Health Risks: Bladder cancer strongly associated with chronic exposure; symptoms may develop over years
Acute Effects: Headache, dizziness, skin discoloration, respiratory irritation
Chronic Effects: Long-term bladder damage, cancer risk even at low exposure, mutagenic effects possible
Warning Symbols: Skull and crossbones, carcinogen
Name: 2-Naphthylamine
Purity: Technical and laboratory grades approach high purity; any contaminant raises unpredictable toxicological issues
Impurities: Commercial material may carry trace residues from manufacturing, raising potential for unexpected health effects
Inhalation: Move to fresh air quickly; persistent cough or breathlessness requires immediate medical help
Skin Contact: Remove contaminated clothing; wash skin fully with water and soap; see a physician for any irritation
Eye Contact: Rinse eyes with running water for several minutes; lifting eyelids aids flushing; seek prompt care
Ingestion: Do not provoke vomiting; rinse mouth; medical assessment is vital due to carcinogenic danger
General Advice: Early action makes a difference—delaying care increases risk
Suitable Extinguishing Agents: Dry powder, carbon dioxide, sand; water spray for cooling containers
Combustion Hazards: Toxic fumes such as nitrogen oxides, carbon monoxide released in fire
Protective Gear: Full firefighting turnout with breathing apparatus; skin protection essential
Fire and Explosion Risk: Dust can ignite under high concentration; keep away from ignition sources
Other Concerns: Runoff from fire control may cause environmental pollution—contain and avoid drains
Personal Precautions: Restrict area for authorized personnel, ventilate; prevent skin and eye contact
Spill Cleanup: Use chemical-resistant gloves and HEPA-filter respirators; collect dry material and seal securely
Environmental Precautions: Stop spill from entering drains or waterways; immediate containment reduces ecological fallout
Decontamination: Wash area thoroughly with water but do not spread material; collect waste for disposal
Handling: Always use in ventilated areas, preferably under chemical fume hoods; never eat, drink, or smoke nearby
Personal Hygiene: Hand washing after handling is not negotiable; contaminated clothing should never leave the workplace
Storage: Keep tightly closed in dry, cool, properly labeled containers; store away from incompatible chemicals (acids, oxidizers)
Preventive Measures: Dedicated tools and storage units limit cross-contamination at work and at home
Ventilation: Laboratory or industrial spaces require strong local exhaust; building-wide systems may help but do not replace point extraction
Respiratory Protection: HEPA-filtered respirators or air-purifying devices limit inhalation risk where engineering controls fall short
Skin Protection: Impervious gloves (nitrile, butyl rubber), lab coats or full-body suits double as barriers against unexpected spills
Eye/Face Protection: Chemical splash goggles and face shields block direct exposure risk
Work Practices: Monitoring for air contamination and medical surveillance for exposed employees support a healthy workplace
Physical State: Solid at room temperature, may clump or form flakes
Color: Pale brown, tan, sometimes white
Odor: Subtle amine scent
Boiling Point: About 306 °C
Melting Point: About 113–115 °C
Vapor Pressure: Very low under standard conditions
Solubility: Slightly soluble in water; dissolves better in organic solvents like alcohols and ethers
Stability in Light: Discolors or yellows slowly, especially in open air
Chemical Stability: Solid material remains stable under standard storage; extended contact with air speeds oxidation
Incompatible Materials: Strong acids, oxidizers, acid chlorides raise risk for hazardous reactions
Decomposition Products: Exposure to flames or high heat creates toxic gases, including ammonia, nitrogen oxides
Polymerization: No known hazard, but keeping batches small cuts risk
Carcinogenicity: 2-Naphthylamine carries a notorious legacy—scientific studies linked it to bladder cancer before World War II; the risk shaped workplace safety laws in several countries
Acute Symptoms: Short-term exposure leads to headache, fatigue, respiratory irritation, blue-tinted skin from blood changes
Skin Effects: May cause allergic contact dermatitis—some get rash, others see no skin changes for years
Chronic Health: Repeated contact, even at low levels, pushes cancer risk higher; latent periods for bladder tumors run up to 30 years
Regulatory Status: Listed by OSHA, IARC, NTP as a proven human carcinogen
Other Effects: Studies in animals raise concerns for genetic impacts beyond cancer; precaution takes priority since safe exposure thresholds are unclear
Aquatic Toxicity: Moderate to high risk for water-dwelling life; persistent and slow to degrade once released
Bioaccumulation: Concentrates in animal and plant tissues, slowly moving up food chains
Soil Impact: Bonds tightly to soil particles, leaches harder in sandy or disturbed locations
Degradation: Lingers for months or years unless cleaned or chemically treated
Wastewater: Industrial discharge may contaminate municipal systems—treatment before release limits broader harm
Waste Disposal: Treat as hazardous; do not pour into drains or toss with general waste
Special Requirements: High-temperature incineration at permitted facilities destroys material safely; landfills with leachate protection as backup
Container Handling: Triple-rinse and destroy containers to erase residual risk
Regulatory Pressure: Strict tracking, recordkeeping, audit trails for all disposal steps add assurance and accountability
Shipping Name: 2-Naphthylamine, solid
Hazard Class: Toxic substance, class 6.1
Packing Group: Usually group II or III, reflecting risk
Transport Precautions: Secure packaging, clear hazard labeling, documentation matching all local and international requirements
Environmental Precautions: Contingency planning for spills in transit, including emergency contacts, supports quick containment
Personal Notification: Only trained handlers and approved routes should move the substance
Carcinogen Regulation: Banned or strictly controlled in dye manufacturing across the EU, United States, Japan, and other developed countries due to cancer risk
Permissible Exposure Limits: OSHA and other regulatory bodies set exposure near zero, reflecting long-term cancer data
Reporting Requirements: Workplace and environmental releases trigger mandatory notification and remediation in most countries
Worker Protections: Medical surveillance, exposure monitoring, and mandatory PPE aimed squarely at limiting exposure
Public Health: Workplaces that handled it in the past track workers for decades due to risk of delayed effect
