§173.50 食品添加剂聚乙烯聚吡咯烷酮(Polyvinylpolypyrrolidone)

　　§ 173.50   Polyvinylpolypyrrolidone.

　　The food additive polyvinylpolypyrrolidone may be safely used in accordance with the following prescribed conditions:

　　（a） The additive is a homopolymer of purified vinylpyrrolidone catalytically produced under conditions producing polymerization and cross-linking such that an insoluble polymer is produced.

　　（b） The food additive is so processed that when the finished polymer is refluxed for 3 hours with water, 5 percent acetic acid, and 50 percent alcohol, no more than 50 parts per million of extractables is obtained with each solvent.

　　（c） It is used or intended for use as a clarifying agent in beverages and vinegar, followed by removal with filtration.

　　更多关于美国 FDA 可直接加入食品中的辅助性食品添加剂的种类法规，请点击美国FDA 21 CFR 第173部分可直接加入食品中的辅助性食品添加剂种类汇总