Understanding Ammonium Hydroxide: Properties and Applications Kumar Jeetendra | October 19, 2023 Chemically speaking, ammonium hydroxide has the formula NH4OH. When dissolved in water, it is frequently referred to as ammonia solution or aqua ammonia. The properties and applications of this material, which is an ammonia gas (NH3) solution in water (H2O), are mostly related to its role as a weak base. The following are some of …