Registration Dossier
Registration Dossier
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EC number: 266-024-0 | CAS number: 65996-89-6 The condensation product obtained by cooling, to approximately ambient temperature, the gas evolved in the high temperature (greater than 700°C (1292°F)) destructive distillation of coal. A black viscous liquid denser than water. Composed primarily of a complex mixture of condensed ring aromatic hydrocarbons. May contain minor amounts of phenolic compounds and aromatic nitrogen bases.
Endpoint summary
Administrative data
Description of key information
Additional information
Coal tar is a residual product of coal distillations and is a poorly water-soluble UVCB substance. Only its water-soluble fraction (see Section 4.8) is expected to be available to significant biological attack, yet is not considered to be readily biodegradable, but single components such as one-ring phenolic structures. Inherent biodegradability has been found for representative components of coal tar e.g.including BTX aromatic compounds, indene, benzofuran, naphthalene acenaphthene, methylnaphthalenes, fluorene, phenol(5,6), cresols, pyridine, picolines, phenanthrene, anthracene, carbazole(6), quinolines(6), fluoranthene, pyrene(1,2) and various other polynuclear aromatic compounds(3-5).
References:
(1) Sax NI, Lewis RJ Jr; Hawley's Condensed Chemical Dictionary 11th ed, NY, Van Nostrand Reinhold Co p. 290 (1987);
(2) Griesbaum K et al; in Ullman's Encyclopedia of Industrial Chemistry, VCH Publishers, New York, NY A13:227-281 (1989)
(3) Sims RC, Overcash MR; Res Rev 88: 1-68 (1983);
(4) Tabak HH et al; J Water PollutContr Fed 53: 1503-18 (1981);
(5) Smith JH et al; Environmental Pathways of Selected Chemicals in Freshwater Systems Part II, Laboratory studies USEPA-600/7 -78 -074 (1978);
(6) Petrassek AC et al; Journal WPCF 55: 1286-96(1983).
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