Ammonium bisulfite is colorless crystals which are soluble in water. It is noncombustible. It is corrosive to aluminum. It is a strong irritant to skin and mucous membranes. It is toxic by skin absorption. Ammonium bisulfite is a solution of yellow crystals. It is a strong irritant to skin and mucous membranes. It is toxic by skin absorption. It may be corrosive to metals. It also has uses as an oxygen scavenger in the oil and gas industry and various applications in the food industry including sugar beet processing and the caramel coloring process