Hydrazine is the chemical name for NH2NH2. Hydrazine is primarily utilised in the preparation of polymer foams as a foaming agent. In humans, symptoms of acute (short-term) hydrazine exposure include eye, nose, and throat irritation, dizziness, headache, nausea, pulmonary edema, convulsions, and coma. Theodor Curtius, a German chemist, invented it in 1889.