Ammonium chloride is a white solid. It breaks down when heated, forming ammonia and hydrogen chloride. When these two gases are cool enough, they react together to form ammonium chloride again.

Dermal Exposure Level Calculations* Formula Used Description EXPFABRIC ... 2,3-dihydroxypropyl-trimethyl ammonium chloride; NESIL = no-expected-sensitization induction level; SA = surface ...