Inorganic salt, formula NH4Cl, formed from the neutralization of hydrochloric acid by ammonia. Ammonium chloride is a low vapor pressure solid, which deliquesces when the relative humidity exceeds 80%. It is thought to be present in the urban aerosol present in smog episodes. See deliquescence.
Colorless crystals which are soluble in water and ammonia. Dust is mildly irritating to eyes, nose and throat. See also Ammonia compounds, Quaternary ammonium chloride. Ammonium chloride is harmful to aquatic life in very low concentrations. Ammonia compounds (Includes ammonium chloride , ammonium hydroxide, benzalkonium chloride - Usually liquids with a pungent odor. Corrosive in concentrations found in commercial products (over 10%). Forms irritating cloramine gas when combined with chlorine-containing products. Fumes can cause irritation of the eyes, respiratory tract. Liquid can cause skin burns. Toxic to fish, and reduces oxygen in surface water. Uses: In many cleaning products, depending on concentration, as antiseptic, bactericide, fungicide, sanitizer, deodorant. Used in detergents as a surfactant. Also found in floor polish, glass window cleaners, household hard surface cleaners, rug and upholstery cleaners.