A colourless, crystalline, phenolic compound derived from certain resins (e.g. galbanum, asafetida, etc.), and resembles orcin.
It may be produced synthetically and used in the manufacture of certain dyes, such as phthalein, fluorescein, and eosin.
Word origin: from its discoverers Hlasi-wetz and Barth who obtained the compound from resin and found its resemblance to orcin.
See also: orcin.