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Definition of coal tar
Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of coal tar is as below...
Coal tar () A
thick,
black,
tarry
liquid,
obtained
by the
distillation
of
bituminous
coal in the
manufacture
of
illuminating
gas; used for
making
printer's
ink, black
varnish,
etc. It is a
complex
mixture
from which many
substances
have been
obtained,
especially
hydrocarbons
of the
benzene
or
aromatic
series..
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Anthracene
::
Anthracene
(n.) A solid
hydrocarbon,
C6H4.C2H2.C6H4,
which
accompanies
naphthalene
in the last
stages
of the
distillation
of coal tar. Its chief use is in the
artificial
production
of
alizarin..
Pyrene
::
Pyrene
(n.) One of the less
volatile
hydrocarbons
of coal tar,
obtained
as a white
crystalline
substance,
C16H10..
Cresol
::
Cresol
(n.) Any one of three
metameric
substances,
CH3.C6H4.OH,
homologous
with and
resembling
phenol.
They are
obtained
from coal tar and wood tar, and are
colorless,
oily
liquids
or
solids.
[Called
also
cresylic
acid.].
Asphaltum
::
Asphaltum
(n.) A
composition
of
bitumen,
pitch,
lime, and
gravel,
used for
forming
pavements,
and as a
water-proof
cement
for
bridges,
roofs,
etc.;
asphaltic
cement.
Artificial
asphalt
is
prepared
from coal tar, lime, sand, etc..
Phenol
::
Phenol
(n.) A white or
pinkish
crystalline
substance,
C6H5OH,
produced
by the
destructive
distillation
of many
organic
bodies,
as wood, coal, etc., and
obtained
from the heavy oil from coal tar..
Kyanol
::
Kyanol
(n.) A base
obtained
from coal tar.
Pseudo-cumene
::
Pseudo-cumene
(n.) A
hydrocarbon
of the
aromatic
series,
metameric
with
mesitylene
and
cumene,
found in coal tar, and
obtained
as a
colorless
liquid..
Chrysene
::
Chrysene
(n.) One of the
higher
aromatic
hydrocarbons
of coal tar,
allied
to
naphthalene
and
anthracene.
It is a white
crystalline
substance,
C18H12,
of
strong
blue
fluorescence,
but
generally
colored
yellow
by
impurities..
Picene
::
Picene
(n.) A
hydrocarbon
(C/H/)
extracted
from the
pitchy
residue
of coal tar and
petroleum
as a
bluish
fluorescent
crystalline
substance.
Aniline
::
Aniline
(n.) An
organic
base
belonging
to the
phenylamines.
It may be
regarded
as
ammonia
in which one
hydrogen
atom has been
replaced
by the
radical
phenyl.
It is a
colorless,
oily
liquid,
originally
obtained
from
indigo
by
distillation,
but now
largely
manufactured
from coal tar or
nitrobenzene
as a base from which many
brilliant
dyes are
made..
Parvoline
::
Parvoline
(n.) A
liquid
base,
C/H/N,
of the
pyridine
group,
found in coal tar; also, any one of the
series
of
isometric
substances
of which it is the
type..
Viridine
::
Viridine
(n.) A
greenish,
oily,
nitrogenous
hydrocarbon,
C12H19N7,
obtained
from coal tar, and
probably
consisting
of a
mixture
of
several
metameric
compounds
which are
higher
derivatives
of the base
pyridine..
Rubidine
::
Rubidine
(n.) A
nitrogenous
base
homologous
with
pyridine,
obtained
from coal tar as an oily
liquid,
C11H17N;
also, any one of the group od
metameric
compounds
of which
rubidine
is the
type..
Quinoline
::
Quinoline
(n.) A
nitrogenous
base, C9H7N
obtained
as a
pungent
colorless
liquid
by the
distillation
of
alkaloids,
bones,
coal tar, etc. It the
nucleus
of many
organic
bodies,
especially
of
certain
alkaloids
and
related
substances;
hence,
by
extension,
any one of the
series
of
alkaloidal
bases of which
quinoline
proper
is the
type..
Leucoline
::
Leucoline
(n.) A
nitrogenous
organic
base from coal tar, and
identical
with
quinoline.
Cf.
Quinoline..
Fluorene
::
Fluorene
(n.) A
colorless,
crystalline
hydrocarbon,
C13H10
having
a
beautiful
violet
fluorescence;
whence
its name. It
occurs
in the
higher
boiling
products
of coal tar, and is
obtained
artificially..
Coal Tar
::
Coal tar () A
thick,
black,
tarry
liquid,
obtained
by the
distillation
of
bituminous
coal in the
manufacture
of
illuminating
gas; used for
making
printer's
ink, black
varnish,
etc. It is a
complex
mixture
from which many
substances
have been
obtained,
especially
hydrocarbons
of the
benzene
or
aromatic
series..
Coridine
::
Coridine
(n.) A
colorless
or
yellowish
oil,
C10H15N,
of a
leathery
odor,
occuring
in coal tar,
Dippel's
oil,
tobacco
smoke,
etc.,
regarded
as an
organic
base,
homologous
with
pyridine.
Also, one of a
series
of
metameric
compounds
of which
coridine
is a
type..
Carbolic
::
Carbolic
(a.)
Pertaining
to, or
designating,
an acid
derived
from coal tar and other
sources;
as,
carbolic
acid
(called
also
phenic
acid, and
phenol).
See
Phenol..
Pyridine
::
Pyridine
(n.) A
nitrogenous
base,
C5H5N,
obtained
from the
distillation
of bone oil or coal tar, and by the
decomposition
of
certain
alkaloids,
as a
colorless
liquid
with a
peculiar
pungent
odor. It is the
nucleus
of a large
number
of
organic
substances,
among which
several
vegetable
alkaloids,
as
nicotine
and
certain
of the
ptomaines,
may be
mentioned.
See
Lutidine..
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