Ammonia Solution (commonly known as aqueous ammonia, with an ammonia content >10%) is a colorless or slightly yellowish transparent liquid at room temperature, characterized by a strong, pungent odor and high volatility. As a weak alkaline solution, its chemical properties are primarily characterized by alkalinity and volatility: it can neutralize acids to form ammonium salts, and ammonia molecules readily escape from the aqueous solution. Based on these characteristics, its main applications include serving as a nitrogen fertilizer (e.g., direct application as aqueous ammonia) and a raw material for compound fertilizer production; in chemical manufacturing for producing nitric acid, soda ash, ammonium salts, and organic amines; and additionally, it is widely used as a laboratory reagent, industrial neutralizing agent, cleaning agent, flue gas desulfurization absorbent, and pharmaceutical raw material. It is important to note that it is corrosive and toxic, requiring strict protective measures during use.