Chem. [ad. L. corallin-us coral-colored, coral-red: see -IN.] A red coloring matter, called also Pæonin, obtained in 1861 by treating phenol with sulphuric and oxalic acids. Yellow corallin (= Aurin), a yellowish-red dye, obtained by heating carbolic acid with the same substances; so called because by heating with ammonia it is converted into the red corallin.
1873. Nature, 11 Dec., 113. By the addition of corallin … to a bromide of silver film, it becomes sensitive to the yellow ray.
1879. Watts, Dict. Chem., 2nd Suppl. 391. Corallin is much used for dyeing on wool, and may also be employed for printing on wool.
