ChemicalBook >>Naphthalene>>Naphthalene(91-20-3)


Product IdentificationBack to Contents
【Product Name】



【Molecular Weight】



【RTECS Class】

Agricultural Chemical and Pesticide; Tumorigen; Mutagen; Reproductive Effector; Human Data; Primary Irritant


【Beilstein Reference】

【EC Index Number】

【EC Class】

Harmful; Dangerous for the Environment
Physical and Chemical PropertiesBack to Contents

White crystalline solid with distinctive odor of mothballs or coal tar.
【Solubility in water】

0.03 g/L
【Melting Point】

【Boiling Point】

【Vapor Pressure】

0.078 (25 C)

1.145 g/cm3 (20 C)
【Partition Coefficient】

【Heat Of Vaporization】

43.5 kJ/mol
【Heat Of Combustion】

-4973 kJ/mol

Manufacture of phthalic & anthranilic acids, naphthols, naphthylamines, sulfonic acid, synthetic resins, celluloid, lampblack, smokeless powder, hydronaphthalenes, insecticide.
【Saturation Concentration】

100 ppm at 25 C
【Vapor Density】

【Odor threshold】

0.084 ppm
【Refractive Index】

1.58212 (20 C)
First Aid MeasuresBack to Contents

Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.

Remove from exposure to fresh air immediately. If breathing is difficult, give oxygen. Get medical aid. DO NOT use mouth-to-mouth respiration. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.

Get medical aid. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.

Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.
Handling and StorageBack to Contents

Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Store protected from moisture.

Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Do not breathe dust, vapor, mist, or gas. Keep container tightly closed. Do not ingest or inhale. Use only in a chemical fume hood.
Hazards IdentificationBack to Contents

May be fatal if inhaled. Causes respiratory tract irritation. May cause salivation, nausea, vomiting, abdominal pain, fever, and labored breathing. Readily absorbed when inhaled.

Causes mild skin irritation. May be absorbed through the skin in harmful amounts. May cause skin sensitization, an allergic reaction, which becomes evident upon re-exposure to this material.

Causes mild eye irritation. This substance is retinotoxic and systemic absorption of its vapors ab ove 15 ppm, may cause cataracts, optical neuritis, injuries to the cor nea and marked eye irritation.

Harmful if swallowed. May cause liver and kidney damage. May cause methemoglobinemia, cyanosis, convulsions, and death. May cause severe digestive tract irritation with abdominal pain, nausea, vomiting and diarrhea. Ingestion of large quantities may cause severe hemolytic anemia and hemoglobinuria.

May be ignited by friction, heat, sparks or flames. Some may burn rapidly with flare burning effect. Powders, dusts, shavings, borings, turnings or cuttings may explode or burn with explosive violence. Substance may be transported in a molten form. May re-ignite after fire is extinguished.
【EC Risk Phrase】

R 22 50/53
【EC Safety Phrase】

S 36/37 60 61
【UN (DOT)】

Exposure Controls/Personal ProtectionBack to Contents
【Personal Protection】

Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.

A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
【Exposure Effects】

Prolonged or repeated skin contact may cause dermatitis. May cause liver and kidney damage. May cause anemia and other blood cell abnormalities. Animal studies have reported that fetal effects/abnormalities may occur when maternal toxicity is seen. Effects may be delayed. Chronic exposure may cause lung damage. Laboratory experiments have resulted in mutagenic effects. Chronic exposure may cause corneal injury, optical neuritis, blurred vision, and possible cataract formation.
【Exposure limit(s)】

NIOSH REL: TWA 10 ppm (50 mg/m3) ST 15 ppm (75 mg/m3) OSHA PEL: TWA 10 ppm (50 mg/m3) IDLH 250 ppm
【Poison Class】

Fire Fighting MeasuresBack to Contents
【Flash Point】


【Fire Fighting】

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Water runoff can cause environmental damage. Dike and collect water used to fight fire. Use water spray to keep fire-exposed containers cool. Dust can be an explosion hazard when exposed to heat or flame. May be ignited by friction, heat, sparks, or flame. May re-ignite after fire is extinguished. Containers may explode when heated. Extinguishing media: Use dry sand or earth to smother fire. Water or foam may cause frothing. Cool containers with flooding quantities of water until well after fire is out. Use dry chemical, carbon dioxide, or appropriate foam.
【Upper exp. limit】

【Lower exp. limit】

【Fire Potential】

Flammable/combustible material.
Accidental Release MeasuresBack to Contents
【Small spills/leaks】

Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Scoop up with a nonsparking tool, then place into a suitable container for disposal. Avoid generating dusty conditions. Remove all sources of ignition.
Stability and ReactivityBack to Contents
【Disposal Code】


Oxidizing agents, chromium trioxide, chromic anhydride, dinitrogen pentaoxide, mineral acids, moisture, stong alkalies, alumiunum chloride + benzoyl chloride.

Stable at room temperature in closed containers under normal storage and handling conditions. Volatile in steam.

Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.
【Combustion Products】

Toxic vapors given off in a fire.
Transport InformationBack to Contents
【UN Number】

【Hazard Class】

【Packing Group】

【HS Code】

2902 90 10
Company Name:Hangzhou QiFei Chemical Co., Ltd.
Company Name:J & K SCIENTIFIC LTD.
Tel:010-82848833- ;010-82848833-
Company Name:Meryer (Shanghai) Chemical Technology Co., Ltd.
Company Name:3B Pharmachem (Wuhan) International Co.,Ltd.
Company Name:Alfa Aesar
Tel:400-610-6006; 021-67582000
Company Name:TCI (Shanghai) Development Co., Ltd.
Tel:021-67121386 / 800-988-0390
Company Name:Energy Chemical
Company Name:Beijing Ouhe Technology Co., Ltd