Ammonia (NH3) is a colorless acrid chemical. It's normal melting point is -78 degrees Celsius and its normal boiling point is -33 degress Celsius, so it is a gas at room temperature and pressure. It dissolves in water to make a basic solution. It is a basic organic solvent which is used as a household cleaning fluid, a fertilizer, a refrigerant, and in industrial processes.
- The New American Desk Encyclopedia, Penguin Group, 1989