robinine

[Mod. Lat.robin(ia); -ine.] Chemistry: C25H30016. A yellow coloring matter found in the blo om of Robinia pseud acacia. To extract it, the recently-gathered flowers are boiled in water, filtered, the filtrate evaporated, and the residue repeatedly exhausted with boiling alcohol. It crystallizes in delicate straw-yellow crystals having a silky luster, melts to a yellow liquid at 195°, is slightly soluble in water and alcohol, insoluble in ether, but di olves readily in alkalies and alkaline carbonate. Its aqueous solution is colored dark brown by ferric chloride, and it reduces cupric oxide in a boiling alkaline solution. robinine-sugar, s. Chem.: C13H1006 (?). A sweet brown syrup. obtained by heating robinine with dilute acids. It does not crystallize, smells of caramel when heated, and yields with nitric acid a large quantity of picric acid. rō-ble, s. [Etym. doubtful.] Bot., .: Wood for shipbuilding, from a Bignoniad, Catalpa long is sima , and Platymiscium platy stachyum, one of the Dalbergieæ. *rob o' dāvỹ, s . [Etym. doubtful; cf. rob , s.) A drink so called.