Coal tar manufacturers and suppliers

Coal tar

CAS:: 65996-93-2

MF:

MW:: 0

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Properties

Melting point:: 30-180 °C

Boiling point:: >250 °C

Density: >1 g/cm3

vapor pressure: 0-0Pa at 20℃

solubility: Slightly soluble in water; partly soluble in ethanol , in ether and in volatile oils.

form: As stated by ACGIH:
The pitch of coal tar is the black or dark brown amorphous residue that remains after the redistillation process. The volatiles contain a large quantity of lower molecular weight polycyclic hydrocarbons. As these hydrocarbons (naphthalene, fluorene, anthracene, acridine, phenanthrene) sublime into the air there is an increase of benzo(a)pyrene (BaP or 3,4-benzpyrene) and other higher weight polycyclic hydrocarbons in the tar and in the fumes. Polycyclic hydrocarbons, known to be carcinogenic, are of this large molecular type.

Water Solubility: 1.54μg/L at 20℃

Dielectric constant: 2.0（Ambient）

LogP: 6.13 at 20℃

Safety Information

Symbol(GHS): GHS08

Signal word: Danger

Hazard statements: H340-H350-H360FD

OEB: D

OEL: TWA: 0.1 mg/m3 (cyclohexane-extractable fraction)

IDLA: 80 mg/m3

Use

coal tar: A tar obtained from the destructivedistillation of coal. Formerly,coal tar was obtained as a byproductin manufacturing coal gas.Now it is produced in making cokefor steel making. The crude tar containsa large number of organiccompounds, such as benzene, naphthalene,methylbenzene, phenols,etc., which can be obtained by distillation.The residue is pitch. At onetime coal tar was the major source oforganic chemicals, most of which arenow derived from petroleum andnatural gas.

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