orcin

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or·cin·ol

(ōr'sin-ol),
Parent substance of the natural dye orcein, obtained from certain colorless lichens (Lecanora tinctoria, Rocella tinctoria) by treatment with boiling water; used as an external antiseptic in various skin diseases and in chemistry as a reagent for pentoses.

orcin

, orcinol (or′sĭn) (-ol″)
A chemical derived from lichens and used as a histological stain.
CAS # 504-15-4
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