Ammonium Bifluoride Flake
This substance can be found as a clear, colorless salt or as small flakes. It is produced by mixing ammonia with hydrogen fluoride. It creates a pungent odor, but it is not flammable. However, it is toxic to humans, mainly if it touches the skin or is ingested.
The primary application for this chemical is a glass etchant. It attacks and breaks down the silica in glass, which is why it works so well for etching. It can also be used in the production of hydrofluoric acid. It acts as a catalyst, turning hexafluorosilicic acid into the former. Finally, it can be found in some cleaning agents, as well as oxidizing agents.
Proper safety gear should be worn at all times when handling ammonium bifluoride flakes. They can be corrosive to both the skin and eyes, and ingestion can be fatal. Gloves, goggles, and a breathing mask should help prevent direct exposure to this substance.