Main Entry: Ev·ans blue

Pronunciation: \ˈev-ənz-\

Function: noun

: a dye C₃₄H₂₄N₆Na₄O₁₄S₄ that on injection into the bloodstream combines with serum albumin and is used to determine blood volume colorimetrically

Evans, Herbert McLean (1882–1971), American anatomist and physiologist. Evans made classic contributions to endocrinology and vitaminology. He was one of the few scientists to study both hormones and vitamins. In 1915 he published an explanation of the physiological behavior of vital stains in the benzidine series and did research on azo dyes, and in particular the dye now called Evans blue.