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EC number: 266-028-2
CAS number: 65996-93-2
The residue from the distillation of high temperature coal tar. A black solid with an approximate softening point from 30°C to 180°C (86°F to 356°F). Composed primarily of a complex mixture of three or more membered condensed ring aromatic hydrocarbons.
Apart from one oral study of limited significance in pigs, no
repeated-dose toxicity studies with pitch addressing effects other than
carcinogenicity have been located. The subchronic feeding study in mice
with coal-tar material (compared to pitch a worst case) indicates that
more marked toxicity following long-term exposure to pitch is unlikely
Tars and pitches constitute a family of products that result from
different distillation steps of coal (condensation products and
distillation residues). Depending on distillation step and distillation
temperature, constituents of the products and their portions are
variable. But major components of all the distillation products and
residues are condensed ring aromatic hydrocarbons in varying composition
(i.e. polynuclear aromatic hydrocarbons). Major toxicological effects of
these products will primarily be caused by the PAH fraction in the
respective substances. Especially for toxicological endpoints that fall
into the toxicological action profile of PAH, it is justified to use
related tars and pitches as supporting substances to characterise
potential effects of pitch, coal tar, high temp.
Repeated dose toxicity: via oral route - systemic effects
(target organ) digestive: liver
Pitch is not classifiable, as there was no
evidence for specific target-organ effects at doses lower than 100 mg/kg
bw/d (test material: coal tar).
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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