purpureïn Chem.
(pɜːˈpjʊəriːɪn)
[f. L. purpure-us (see purpureal) + -in; named after orcein.]
A product of the action of ammonia on purpurin, which dyes a fine rose-red or amaranth-red. Also called purpuramide.
| 1863 Stenhouse in Proc. Royal Soc. XIII. 145 This compound being in its mode of formation and physical properties very analogous to orceine, I have called it purpureine. 1866–8 Watts Dict. Chem. IV. 749 Purpureïn or purpuramide is nearly insoluble in sulphide of carbon. |