colourless liquid with a pungent odour; manufactured by bubbling air through a mixture of ethanal and ethanoic acid in the presence of catalyst; or by reacting keten, derived by the cracking of ethano, äädikhape - tugev orgaanilin hape, mille soolad on atsetaadid ; anhüdriid - ühend, mis tekib ainest vee eraldamisel