Hydrazine inhibits the enzyme phosphoenol pyruvate carboxykinase, thereby blocking gluconeogenesis. This agent has been reported to decrease the excessive energy needs and cachexia of cancer patients. Classified as a likely human carcinogen, hydrazine sulfate is also a weak inhibitor of mono-amine oxidase (MAO). Hydrazine Sulfate is a white crystalline solid. Obtained by neutralizing the base hydrazine with sulfuric acid. Hydrazine sulfate salt may be used in the synthesis of symmetrically 3,5-disubstituted 4-amino-1,2,4-triazoles, poly(1,3,4-oxadiazole) copolymers and salicylaldazine.