Ammonia derivatives, also known as amines, are organic compounds derived from ammonia. They are composed of nitrogen and hydrogen atoms and can be classified into primary, secondary, tertiary, and quaternary amines. Primary amines are the simplest form of amines and are formed when one hydrogen atom is replaced by an alkyl or aryl group. Secondary amines are formed when two hydrogen atoms are replaced by alkyl or aryl groups. Tertiary amines are formed when three hydrogen atoms are replaced by alkyl or aryl groups. Quaternary amines are formed when all four hydrogen atoms are replaced by alkyl or aryl groups. Ammonia derivatives are used in a variety of applications, including pharmaceuticals, cosmetics, and food additives.