ANDREW LAMBERT PHOTOGRAPHY / SCIENCE PHOTO LIBRARY ANDREW LAMBERT PHOTOGRAPHY / SCIENCE PHOTO LIBRARY
Brady's reagent (2,4-dinitrophenylhydrazine) reacting with ethanal in a test tube. Brady's reagent is used to indicate the presence of aldehydes or ketones in solutions. In the presence of aldehyde or ketone groups, yellow crystalline hydrazone derivatives form. This is an early stage of the reaction, for a later stage see A500/530.
Model release not required. Property release not required.