Question

(i)       State the characteristics of the byproduct labelled as coal tar

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Answer 1

Coal tar causes increased sensitivity to sunlight, so skin treated with topical coal tar preparations should be protected from sunlight. The residue from the distillation of high-temperature coal tar, primarily a complex mixture of three or more membered condensed ring aromatic hydrocarbons , was listed on 28 October 2008 as a substance of very high concern by the European Chemicals Agency