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n.1.(Chem.) A white crystalline substance, C6H4(OH)2, of the phenol series, found in various plants; - so called because first obtained by distillation of gum catechu. Called also catechol, oxyphenol. etc.
References in periodicals archive ?
Oligomera produced on the basis of individual substances of pyrocatechin, hydrochinone and pyrogallol had low plasticizing ability.