Anhydrous ammonia is a chemical compound composed of one nitrogen atom and three hydrogen atoms (NH3), existing as a colorless gas at room temperature but often stored and transported as a compressed liquid. It's notable for being anhydrous, meaning it contains no water, unlike common household ammonia solutions. Anhydrous ammonia is widely used as a fertilizer due to its high nitrogen content, but it's also a hazardous substance due to its corrosive and caustic nature, and potential to cause severe burns and respiratory issues upon exposuree.