... Co.,Ltd is one of the leading gamma-butyrolactone suppliers and also a professional such manufacturer in China, welcome to ... be used to produce 2-pyrrolidone, N-methyl-2-pyrrolidone and polyvinyl-pyrrolidone.2.It is also an ideal antioxidant, ... plasticizer, extractant, absorbent, dispersant, color fixing agent and coagulant.3.In pharmaceutical industry, it can be used as ...