In 1819–1820, at least two chemists reported a white solid with a pungent odor derived from the distillation of coal tar. In 1821, John Kidd described many of this substance’s properties and the means of its production, and proposed the name naphthaline, as it had been derived from a kind of naphtha (a broad term encompassing any volatile, flammable liquid hydrocarbon mixture, including coal tar). Naphthaline’s chemical formula was determined by Michael Faraday in 1826. The structure of two fused benzene rings was proposed by Emil Erlenmeyer in 1866, and confirmed by Carl Gräbe three years later.
Naphthalene, also known as naphthalin, bicyclo[4.4.0]deca-1,3,5,7,9-pentene or antimite and not to be confused with naphtha, is a crystalline, aromatic, white, solid hydrocarbon with formula C10H8and the structure of two fused benzene rings. It is best known as the traditional, primary ingredient of mothballs. It is volatile, forming a flammable vapor, and readily sublimes at room temperature, producing a characteristic odor that is detectable at concentrations as low as 0.08 ppm by mass.
Naphthalene is most commonly used to make mothballs for House hold applications and Pest control in Closets or against Rodents,Insects, etc.
Naphthalene can be reacted with other chemicals like Sulphuric acid, polymerization agents, Caustic Soda, etc for many other applications eg. Pharmaceutical intermediates, Dyestuffs (colorants for textiles, etc), Concrete applications as water reducer (Rheology improver), Pesticides, etc… Read more about naphthalene application
If you take off the top of the bottle of naphthalene and have a smell, you get the strong odour of old fashioned moth balls. Why .. because as you correctly say, it is subliming. However this is not instantaneous. It is a relatively slow process. Yes, if you left the top off the bottle, it would all sublime, but not today or tomorrow … it would take quite a few days. Old fashioned moth balls, that granny put in her drawer to stop the moths eating her wolly cardigans, lasted for weeks or months.
When you start heating it is still subliming, but at a faster rate. However, when you reach 80C it will melt pretty rapidly as this is it’s melting point. You get a colourless liquid. Note that the liquid, although not boiling, is still forming naphthalene vapour.
Napthalene may be synthesized chemically by Howarth synthesis or Diel’s Alder approach. This is chemical synthesis starting from say benzene. Otherwise, it may be obtained from crude petroleum etc.
No, naphthalene is a non polar organic solid so insoluble in water.
The boiling point of Napthalene (C10H8) is 218 °C, 491 K or 424 °F.
79.5 degrees celcius.
Yes, we have sell this product to worldwide.
Our naphthalene is DG, this is list below for detail.
|Hazard Codes||: Xn = Harmfull, N = Dangerous for the environment, F = Highly Flammable, T = Toxic|
|RIDADR||: UN 1334 4.1/PG 3|
|HS Code||: 29029010|
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