21 C.F.R. § 173.50 Polyvinylpolypyrrolidone.
Title 21 - Food and Drugs
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.
Title 21: Food and Drugs
PART 173—SECONDARY DIRECT FOOD ADDITIVES PERMITTED IN FOOD FOR HUMAN CONSUMPTION
Subpart A—Polymer Substances and Polymer Adjuvants for Food Treatment
§ 173.50 Polyvinylpolypyrrolidone.
