Ammonium fluoride is a white crystalline solid that is soluble in water and is fairly stable. Ammonium fluoride is labeled as a poison by the Department of Transportation. Ammonium fluoride is utilized in brewing, chemical analysis and wood preservation.
Ammonium fluoride is corrosive to most metals, glass and cement. Inhaling or ingesting ammonium fluoride causes bodily harm. Inhaling ammonium fluoride dust may result in an irritated respiratory system, and ingestion of even small amounts may be fatal. This crystalline compound burns skin on contact. Fluoride typically appears in urine samples following skin contact with ammonium fluoride. Ammonium fluoride does have a degree of flammability, but in most fire scenarios it does not burn.