Ammonium Hydroxide Formula

The correct formula for ammonium hydroxide is NH4OH. This compound is also known as aqueous ammonia because it is a solution of ammonia gas in water. The molecule consists of one nitrogen atom, four hydrogen atoms, and one oxygen atom. The nitrogen atom forms four covalent bonds with the four hydrogen atoms, and it also has a lone pair of electrons which makes the molecule basic in nature. The oxygen atom is bonded to the nitrogen atom via a covalent bond and has a negative charge due to the lone pair of electrons on it. The formula NH4OH is commonly used to represent this compound, but it can also be written as NH3·H2O to indicate that it is a solution of ammonia gas in water.