© 2026 Nanjing Finechem Holdings Co., Ltd,
All Right Reserved
Product Name: Naphthalene
Chemical Formula: C10H8
CAS Number: 91-20-3
Recommended Use: Solvent, moth repellent, intermediate for chemical synthesis
Manufacturer: Information typically available through shipping paperwork and supplier labels
Emergency Contact: Refer to national poison control and local emergency response numbers, provided on transport documentation
GHS Classification: Flammable solid, Carcinogenic category 2, Acute toxicity (oral) category 4, Aspiration hazard category 1
Label Elements: Flame icon, exclamation mark, health hazard symbol
Hazard Statements: Flammable solid, harmful if swallowed or inhaled, may cause cancer, suspected of damaging fertility & harming unborn child
Precautionary Statements: Keep away from heat or open flame, avoid breathing dust, wash hands thoroughly after handling, use only in well-ventilated spaces
Chemical Name: Naphthalene
Concentration: Pure substance or 90-100% in technical grade
Impurities: Trace amounts of biphenyls or polycyclic aromatic hydrocarbons, depending on production process
Inhalation: Move affected individual to fresh air, monitor for difficulty breathing, seek immediate medical attention if symptoms persist
Skin Contact: Remove contaminated clothing, rinse skin with running water, use soap for persistent residues
Eye Contact: Flush eyes with water for several minutes, remove contact lenses, seek medical advice if irritation remains
Ingestion: Rinse mouth, do not induce vomiting, seek medical help immediately
Important Symptoms and Effects: Nausea, headache, dizziness, skin or eye irritation, respiratory distress, hemolytic anemia in severe cases
Suitable Extinguishing Media: Dry chemical, carbon dioxide, foam, sand; water may be ineffective for bulk fires
Hazards: May emit toxic fumes including carbon monoxide, carbon dioxide, and naphthalene vapors
Protective Equipment: Firefighters need full protective gear, positive pressure breathing apparatus
Special Precautions: Cool closed containers exposed to fire with water, control run-off water to prevent environmental contamination
Personal Precautions: Eliminate ignition sources, ventilate area, avoid inhalation or skin contact
Environmental Precautions: Prevent entry to sewers or waterways, alert authorities in case of large spill
Containment: Use non-sparking tools, sweep up solids without generating dust, collect in sealable containers for proper disposal, wash area with water and detergent after picking up the material
Safe Handling Recommendations: Avoid dust formation, ensure ventilation, prevent contact with skin, eyes, and clothing, do not eat or smoke during use
Storage Conditions: Store in tightly closed, properly-labelled containers away from sources of heat or ignition, keep in a cool and dry place, segregate from strong oxidizers and acids
Operations: Ensure transfer and container-filling equipment are well-grounded, avoid generation of static electricity
Engineering Controls: Use local exhaust ventilation to keep airborne concentrations below occupational exposure limits
Exposure Limits: OSHA PEL: 10 ppm TWA; ACGIH TLV: 10 ppm TWA, 15 ppm STEL, not suitable for pregnant or lactating workers
Personal Protection: Respiratory protection with dust/mist filter, chemical-resistant gloves, eye protection (goggles), flame-resistant clothing
Hygiene Measures: Wash hands after handling, remove contaminated clothing, refrain from eating or drinking while working with naphthalene, shower after use
Appearance: White, volatile crystalline solid, strong odor similar to mothballs
Odor Threshold: Detectable at low levels; pungent, distinctive
Molecular Weight: 128.17 g/mol
Melting Point: 80.2°C
Boiling Point: 218°C
Vapor Pressure: 0.087 mmHg at 25°C
Solubility: Insoluble in water; soluble in ether, benzene, chloroform
Density: 1.145 g/cm³ at 20°C
Flammability: Flammable, lower explosive limit 0.9%, upper explosive limit 5.9% in air
Partition Coefficient (log Kow): 3.3
Chemical Stability: Stable under normal temperatures and recommended storage conditions
Reactivity: May react with strong oxidizing agents, causing fire or explosion
Conditions to Avoid: High heat, sparks, open flames, prolonged exposure to light or air
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide, incompletely burned carbon particulates
Polymerization: Does not undergo hazardous polymerization
Acute Toxicity: Ingesting 5-15 grams may be fatal for adults, especially if not treated quickly
Inhalation: May irritate respiratory tract, cause coughing or headache, risk of delayed hemolytic anemia, especially in people with G6PD deficiency
Dermal: Prolonged or repeated skin contact may result in irritation, burns, or allergic reactions
Carcinogenicity: Classified as a possible human carcinogen (IARC Group 2B); long-term exposure may increase cancer risk
Mutagenicity/Teratogenicity: Evidence of reproductive effects and potential risk to unborn child
Chronic Effects: Exposure leads to cataract formation, hemolytic anemia, especially in individuals with enzyme deficiencies
Ecotoxicity: Toxic to aquatic organisms, high potential for bioaccumulation
Persistence and Degradability: Persists in soil and water, undergoes gradual biodegradation
Bioaccumulative Potential: Readily accumulates in fish and invertebrates, threat to higher levels of aquatic food chain
Mobility in Soil: Moderate to low; naphthalene binds to organic matter in soil
Environmental Impact: Contamination affects growth and hatching rate of aquatic animals, leaching contaminates groundwater
Waste Disposal Methods: Dispose by incineration at approved facilities, use processes that oxidize or degrade naphthalene, never discard in regular trash or by pouring down drains
Container Disposal: Rinse thoroughly, dispose as hazardous waste, follow local and national regulations
Special Precautions: Prevent accidental release during transport to disposal facility, use responsible waste contractors, document disposal for compliance audits
UN Number: UN1334
Proper Shipping Name: Naphthalene, refined or crude
Transport Hazard Class: 4.1 (Flammable solid)
Packing Group: III
Marine Pollutant: Yes
Special Transport Precautions: Label consignment correctly, segregate from foodstuffs and oxidizers, inspect packaging for damage during handling, carry transport documentation as required by law
OSHA Hazard Communication: Covered under OSHA industrial chemicals regulations
SARA Title III: Section 313 reportable chemical; emissions subject to reporting by users in the US
TSCA: Listed in US Toxic Substances Control Act inventory
EU Regulation: Classified as hazardous under CLP Regulation (EC) No 1272/2008
Other National Regulations: Check workplace-specific and community right-to-know requirements, local exposure limits, and transport regulations for your jurisdiction
