Polyvinylcaprolactam / PNVCL / 2H-Azepin-2-one, 1-ethenylhexahydro-, homopolymer Luviskol PLUS Alternative | CAS 25189-83-7 Product Introduction Polyvinylcaprolactam, also known as PNVCL or PVCL , is a nonionic water-soluble and alcohol-soluble polymer produced by the polymerization of N-vinylcaprolactam. Its full chemical name is 2H-Azepin-2-one, 1-ethenylhexahydro-, homopolymer , and its CAS number is 25189-83-7 . The molecular formula is (C₈H₁₃NO)n . This product is widely