Basic information description naphthalene poisoning Chemical Properties Uses Definition Air & Water Reactions Reactivity Profile Health Hazard Fire Hazard Safety Related Supplier
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Naphthalene

Basic information description naphthalene poisoning Chemical Properties Uses Definition Air & Water Reactions Reactivity Profile Health Hazard Fire Hazard Safety Related Supplier
Naphthalene Basic information
Naphthalene Chemical Properties
  • Melting point:80-82 °C(lit.)
  • Boiling point:218 °C(lit.)
  • Density 0.99
  • vapor density 4.4 (vs air)
  • vapor pressure 0.03 mm Hg ( 25 °C)
  • refractive index 1.5821
  • Flash point:174 °F
  • storage temp.  APPROX 4°C
  • solubility methanol: soluble50mg/mL, clear, colorless
  • form Faint beige to brown to salmon red powder
  • color White to almost white
  • explosive limit0.9-5.9%(V)
  • Water Solubility 30 mg/L (25 ºC)
  • Merck 14,6370
  • BRN 1421310
  • CAS DataBase Reference91-20-3(CAS DataBase Reference)
  • NIST Chemistry ReferenceNaphthalene(91-20-3)
  • EPA Substance Registry SystemNaphthalene(91-20-3)
Safety Information
MSDS
Naphthalene Usage And Synthesis
  • descriptionNaphthalene, the simplest of the fused or condensed ring hydrocarbon compounds composed of two benzene rings sharing two adjacent carbon atoms. Naphthalene is the most abundant single constituent of coal tar, a volatile product from the destructive distillation of coal, and is also formed in modern processes for the high-temperature cracking (breaking up of large molecules) of petroleum.
    Naphthalene is an important hydrocarbon raw material and is primarily used to manufacture phthalic anhydride and polyvinyl chloride (PVC) plastics, but is also used in moth repellents and toilet deodorant blocks.
    Exposure to naphthalene is associated with hemolytic anemia, damage to the liver and neurological system, cataracts and retinal hemorrhage. Naphthalene is reasonably anticipated to be a human carcinogen and may be associated with an increased risk of developing laryngeal and colorectal cancer.
    Hemolytic anemia has been reported in infants born to mothers who "sniffed" and ingested naphthalene (as mothballs) during pregnancy. Available data are inadequate to establish a causal relationship between exposure to naphthalene and cancer in humans. EPA has classified naphthalene as a Group C, possible human carcinogen.
    1-Methylnaphthalene and 2-methylnaphthalene are naphthalene-related compounds. 1-Methylnaphthalene is a clear liquid and 2-methylnaphthalene is a solid; both can be smelled in air and in water at very low concentrations. 1-Methylnaphthalene and 2-methylnaphthalene are used to make other chemicals such as dyes and resins. 2-Methylnaphthalene is also used to make vitamin K.
  • naphthalene poisoningNaphthalene is a white solid substance with a strong smell. Poisoning from naphthalene destroys or changes red blood cells so they cannot carry oxygen. This can cause organ damage.
    In humans, naphthalene is broken down to alpha-naphthol, which is linked to the development of hemolytic anemia. Kidney and liver damage may also occur. Alpha-naphthol and other metabolites are excreted in urine.
    In animals, naphthalene breaks down into other compounds including alpha-naphthol, which may affect the lungs and eyes. Naphthalene was found in the milk of exposed cows, but the residues disappeared quickly after the cows were no longer exposed. Nearly all the naphthalene was broken down into other compounds and excreted in their urine.
    References
    http://npic.orst.edu/factsheets/naphgen.html
    Naphthalene is made from crude oil or coal tar. It is also produced when things burn, so naphthalene is found in cigarette smoke, car exhaust, and smoke from forest fires. It is used as an insecticide and pest repellent. Naphthalene was first registered as a pesticide in the United States in 1948.
  • Chemical Propertieswhite to almost white crystals, crystalline flakes
  • UsesNaphthalene was used in liquid-phase exfoliation of graphite in organic solvents for the production of graphene sheets. It was used in preparation of carbon-coated Si 70 Sn 30 nanoparticles. It was used as fluorescent probe to study the aggregation behavior of sodium cholate. It was used to investigate influence of added short chain linear and branched alcohols on the binding of 1:1 complex of naphthalene and β-cyclodextrin.
  • DefinitionChEBI: An aromatic hydrocarbon comprising two fused benzene rings. It occurs in the essential oils of numerous plant species e.g. magnolia.
  • Air & Water ReactionsHighly flammable. Insoluble in water.
  • Reactivity ProfileVigorous reactions, sometimes amounting to explosions, can result from the contact between aromatic hydrocarbons, such as Naphthalene, and strong oxidizing agents. They can react exothermically with bases and with diazo compounds. Substitution at the benzene nucleus occurs by halogenation (acid catalyst), nitration, sulfonation, and the Friedel-Crafts reaction. Naphthalene, camphor, glycerol, or turpentine will react violently with chromic anhydride [Haz. Chem. Data 1967. p 68]. Friedel-Crafts acylation of Naphthalene using benzoyl chloride, catalyzed by AlCl3, must be conducted above the melting point of the mixture, or the reaction may be violent [Clar, E. et al., Tetrahedron, 1974, 30, 3296].
  • Health HazardFire may produce irritating and/or toxic gases. Contact may cause burns to skin and eyes. Contact with molten substance may cause severe burns to skin and eyes. Runoff from fire control may cause pollution.
  • Fire HazardFlammable/combustible material. 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 at a temperature that may be above its flash point. May re-ignite after fire is extinguished.
Naphthalene Preparation Products And Raw materials
Naphthalene(91-20-3)Related Product Information
NaphthaleneSupplierMore
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  • Products Intro:Product Name:Naphthalene
    CAS:91-20-3
    Purity:99% HPLC Package:1Mg ; 5Mg;10Mg ;100Mg;250Mg ;500Mg ;1g;2.5g ;5g ;10g
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