In enzymology, an urethanase () is an enzyme that catalyzes the chemical reaction urethane + H2O ethanol + CO2 + NH3 Thus, the two substrates of this enzyme are urethane and H2O, whereas its 3 products are ethanol, CO2, and NH3. This enzyme belongs to the family of hydrolases, those acting on carbon-nitrogen bonds other than peptide bonds, specifically in linear amides. The systematic name of this enzyme class is urethane amidohydrolase (decarboxylating). This enzyme is also called urethane hydrolase. References EC 3.5.1 Enzymes of unknown structure