Adipic dihydrazide(ADH), also known as dihydrazide, is pure white crystals, it is easily soluble in water and poisoned. Mainly used as epoxy powder coating curing agent and coating additive, metal deactivator and other polymer additives and water treatment agent. Same as bifunctional cross-linking reagent, special used for aldehydes to generate relatively stable hydrazone links. It can be a protein drug carrier after being cross-linked with sodium hyaluronate. It plays cross-linking role with diacetone acrylamide in water emulsion and water-soluble polymer. It can also be used as indoor formaldehyde adsorbent and intermediate raw materials.