kwas oliwetorowy, olivetoric acid, Olivetorsäure

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TLC, spot tests

class: Orcinol Depsides
Rf values in standard eluents systems: A: 29 · B: 37 · B': 39 · C: 25

Visibility: in natural light: — · in UV-C (254nm): + · fluorescence in UV-A (ca.360nm): bright blue

Visibility after H2SO4 spraying and 10 min in 110°C charring:
in natural light: pale orange, green halo
in UV-A (ca.360nm): bright blue

Spot tests: K — · C pink, red · KC dark red · P — · FeCl3 purple, violet-red · other: Ba(OH)2 yellow

microcrystallization

GE - thin curved needles; GAW - oil drops -> slowly forms radialy arranged forked needles