Ammonium fluoride is widely used in various industrial and laboratory applications. It serves as a key component in the etching and polishing of glass, particularly in the production of optical lenses and electronic displays. In the metal industry, it is employed as a flux for soldering and welding to remove oxides and improve the quality of joints. Additionally, it is utilized in wood preservation to protect against fungal decay and insect damage. In analytical chemistry, ammonium fluoride acts as a buffering agent and is used in the preparation of samples for analysis. Its ability to complex with metal ions makes it valuable in cleaning and surface treatment processes. However, due to its toxicity, careful handling and safety precautions are essential.