Jacquemin test

Jac·que·min test

(zhah-kuh-min[h]'),
a test for phenol; to the suspected fluid an equal amount of aniline is added, and, after thorough admixture, a little solution of sodium hypochlorite; if phenol is present the fluid becomes blue.

Jacquemin,

Emile, 19th century French chemist.
Jacquemin test - a test for phenol.