subchapter_subject: "FOOD FOR HUMAN CONSUMPTION (CONTINUED)"
part_code: "173"
part_subject: "SECONDARY DIRECT FOOD ADDITIVES PERMITTED IN FOOD FOR HUMAN CONSUMPTION"
subpart_code: "A"
subpart_subject: "Polymer Substances and Polymer Adjuvants for Food Treatment"
section_number: "173.50"
section_subject: "Polyvinylpolypyrrolidone."
cfr_reference: "21 CFR 173.50"
title_name: "Title 21"
title_subject: "Food and Drugs"
parts_covered: "Parts 170 to 199"
revised_date: "Revised as of April 1, 2019"
publication_date: "As of April 1, 2019"
contains_description: "Containing a codification of documents of general applicability and future effect"
publication_info: "Published by the Office of the Federal Register National Archives and Records Administration as a Special Edition of the Federal Register"
---
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.