Mecrylate (metyl 2-cyanoacrylate) ) is a clear, colorless liquid with a strong, acrid odor. In contact with hydroxide ions (liquids like blood or water, air humidity), the cyanoacrylates form long, strong and waterproof chains in an exothermic reaction. The resulting polymer leads to a stable adhesive bond. It may be used as tissue adhesive in surgery. Mecrylate is the first generation short-chain cyanoacrylate, it turned out to be histotoxic and caused distinct foreign-body reactions.