Folin's reagent
（重定向自Folin reagent）
![Skeletal formula of Folin's reagent](/Images/godic/202501/13/Folin's_reagent2936.png")
![Space-filling model of the Folin's reagent molecule](/Images/godic/202501/13/Folin's_reagent_3D_spacefill2937.png")
![](/Images/godic/202501/13/Folin_reaction2937.png")
Folin's reagent or sodium 1,2-naphthoquinone-4-sulfonate is a chemical reagent used as a derivatizing agent to measure levels of amines and amino acids. The reagent reacts with them in alkaline solution to produce a fluorescent material that can be easily detected.