<unk>  (trade name Anaflex) is an antiseptic for local treatment of the skin and the mouth. It is a polymer of urea and formaldehyde. The latter is the active principle after being released from the polymer.
Polynoxylin
Trypan Blue
Trifoliate orange
Silver stain
Gentian violet
Tuberculin
2,4,6-Trichlorophenol
Phanquinone