Millon reaction

Mil·lon re·ac·tion

(mē-on[h]'), the reaction of phenolic compounds (for example, tyrosine in protein) with Hg(NO3)2 in HNO3 (and a trace of HNO2) to give a red color. [A. N. E. Millon]

Millon,

Auguste N.E., French chemist, 1812-1867. Millon-Nasse test - for protein.Millon reaction - used to test for proteins.Millon reagent - mercuric nitrate and nitric acid as used in the Millon reaction.