Adipoyl chloride (or adipoyl dichloride) is a di-acyl chloride, with formula C6H8Cl2O2. It is a hazardous chemical that evolves HCl when reacted with water. It should be handled with full protection under a fume hood. Adipoyl chloride can be reacted with hexamethylenediamine to form nylon 6,6. Adipoyl chloride can be prepared from adipic acid.