fluorescein

/floo-res-ee-in, flaw-, floh-/US // flʊˈrɛs i ɪn, flɔ-, floʊ- //UK // (ˌflʊəˈrɛsɪɪn) //

荧光素,荧光剂,萤光素,萤光剂

Definitions

n.名词 noun

1
Chemistry.
- : an orange-red, crystalline, water-insoluble solid, C20H12O5, that in alkaline solutions produces an orange color and an intense green fluorescence: used to trace subterranean waters and in dyes.

By repeating this process two or three times, the fluorescein may be obtained in a very pure condition.
Fluorescein is readily nitrated, yielding a di- or tetra-nitro compound according to conditions.
If we fill a glass container with a fluorescein solution and look at it by reflected light it appears green.