proflavine

noun

pro·​fla·​vine (ˈ)prō-ˈflā-ˌvēn 

variants also proflavin

-vən 

: a yellow crystalline mutagenic acridine dye C₁₃H₁₁N₃

also : the orange to brownish red hygroscopic crystalline sulfate used as an antiseptic especially for wounds see acriflavine