The hematoxylin shortage and the availability of synthetic substitutes.
D000818:Animals; D001565:Benzoates; D001578:Benzopyrans / Q000600:supply & distribution*; D055598:Chemical Phenomena; D002621:Chemistry; D004396:Coloring Agents / Q000600:supply & distribution*; D000431:Ethanol; D006801:Humans; D007192:Indenes / Q000600:supply & distribution; D051381:Rats; D012995:Solubility; D013194:Staining and Labeling; D013270:Stomach / Q000473:pathology; D014966:Xanthenes
D001565:Benzoates; D001578:Benzopyrans; D004396:Coloring Agents; D007192:Indenes; D014966:Xanthenes; D000431:Ethanol