\Naph"tha*lene\, n. (Chem.)
A white crystalline aromatic hydrocarbon, {C10H8}, analogous
to benzene, and obtained by the distillation of certain
bituminous materials, such as the heavy oil of coal tar. It
is the type and basis of a large number of derivatives among
organic compounds. Formerly called also {naphthaline}.
{Naphthalene red} (Chem.), a dyestuff obtained from certain
   diazo derivatives of naphthylamine, and called also
   {magdala red}.
{Naphthalene yellow} (Chem.), a yellow dyestuff obtained from
   certain nitro derivatives of naphthol.