Adipic Dihydrazide (ADH) is an effective crosslinking agent, curative and hardener. It is widely used as a difunctional crosslinking agent in paints and coatings for certain water-based acrylic emulsions; Used as a hardener for epoxy resins and a chain extender for polyurethanes; Also used as a formaldehyde scavenger preventing the liberation of formaldehyde.