Ammonia

Ammonia is a colourless gaseous substance with a sharp, irritating odour. It melts at ‑77.7 ℃ and boils at ‑33.5 ℃, with a gas density of 0.73 kg/m³. Classified as DOT hazard class 2.3 (toxic gas) and 8 (corrosive material. It presents toxic and corrosive hazards during handling and transportation, and proper safety precautions are required throughout storage, transit and application.