Naphthalene

  • Naphthalene, crude
  • Naphthalene, refined
  • Tar camphor
  • White-tar
  • Mothballs
  • Naphthaliin
Formula
C10H8
Structure
Description
White crystalline solid with distinctive odor of mothballs or coal tar.
Uses
Manufacture of phthalic & anthranilic acids, naphthols, naphthylamines, sulfonic acid, synthetic resins, celluloid, lampblack, smokeless powder, hydronaphthalenes, insecticide.

Registry Numbers and Inventories.
CAS
91-20-3
EC (EINECS/ELINCS)
202-049-5
EC Index Number
601-052-00-2
EC Class
Harmful; Dangerous for the Environment
R 22 50/53
S 36/37 60 61
RTECS
QJ0525000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Mutagen; Reproductive Effector; Human Data; Primary Irritant
UN (DOT)
1334
Merck
12,6457
Beilstein/Gmelin
1421310
Beilstein Reference
4-05-00-01640
RCRA
U165
EPA OPP
55801
Swiss Giftliste 1
G-2069
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C10H8
Formula mass
128.16
Melting point, °C
80
Boiling point, °C
218
Vapor pressure, mmHg
0.08 (25 C)
Vapor density (air=1)
4.42
Saturation Concentration
100 ppm at 25 C
Evaporization number
<1 (butyl acetate=1)
Odor Threshold Odor threshold 0.084 ppm
Critical temperature
475
Critical pressure
40.0
Density
0.979 g/cm3 (80 C)
Solubility in water
30 mg/L (20 C)
Viscosity
0.886 cp (80 C)
Surface tension
31.8 g/s2
Refractive index
1.58212 (20 C)
Dipole moment
0.92 D
Dielectric constant
3.22 (81 C)
Partition coefficient, pKow
3.30
Heat of fusion
18.8 kJ/mol
Heat of vaporization
43.5 kJ/mol
Heat of combustion
-5196

Hazards and Protection.
Storage
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.
B4 D2B
Handling
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.
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.
Respirators
A half-face respirator with an organic vapor cartridge and particulate filter (NIOSH type P95 or R95 filter) may be worn for up to ten times the exposure limit or the maximum use concentration specified by the appropriate regulatory agency or respirator supplier, whichever is lowest. A full-face piece respirator with an organic vapor cartridge and particulate filter (NIOSH P100 or R100 filter) may be worn up to 50 times the exposure limit, or the maximum use concentration specified by the appropriate regulatory agency or respirator supplier, whichever is lowest. Please note that N series filters are not recommended for this material. For emergencies or instances where the exposure levels are not known, use a full-face piece positive-pressure, air-supplied respirator.
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.
Disposal code
3
Stability
Stable at room temperature in sealed containers. Sublimes appreciably at temperatures above melting point.
Incompatibilities
Strong oxidizers, strong alkalis and strong mineral acids, mixtures of aluminum trichloride and benzoyl chloride. Reacts violently with chromic anhydride.
Decomposition
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C
87
Autoignition, °C
526
Upper exp. limit, %
5.9
Lower exp. limit, %
0.9
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.
Fire potential
Flammable/combustible material.
Hazards
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.
Combustion products
Toxic vapors given off in a fire.
Health
2
 
Flammability
2
 
 
Reactivity
0
 

Health.
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
3
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.
   Ingestion
Toxic. Can cause headache, profuse perspiration, listlessness, dark urine, nausea, vomiting and disorientation. Intravascular hemolysis may also occur with symptoms similar to those noted for inhalation. Severe cases may produce coma with or without convulsions. Death may result from renal failure
   Inhalation
Inhalation of dust or vapors can cause headache, nausea, vomiting, extensive sweating, and disorientation. The predominant reaction is delayed intravascular hemolysis with symptoms of anemia, fever, jaundice, and kidney or liver damage.
   Skin
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.
   Eyes
Vapors and solid causes irritation, redness and pain. Very high exposures can damage the nerves of the eye.

First aid
 
   Ingestion
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.
   Inhalation
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.
   Skin
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.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
1334
Response guide
Hazard class
4.1
Packing Group
III
 
USCG CHRIS Code
NTM
 
32 Aromatic hydrocarbons
HS Code
2902 90 10
 
Std. Transport #
4917459 4917473
 
IMO Chemical Code
17
IMO Pollution Category
A
IMO Hazard code
S/P