caustic [caustics](envelope of reflected or refracted rays of light for a given surface or object) noun [UK: ˈkɔː.stɪk] [US: ˈkɑː.stɪk]Though common in cleaning products, ammonia is caustic. = Anche se comune nei prodotti per la pulizia, l'ammoniaca è caustica.
soda causticanoun {f}
lye [lyes](potassium or sodium hydroxide) noun [UK: laɪ] [US: ˈlaɪ]