§ 173.50 Polyvinylpolypyrrolidone.
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Title 21—Food and Drugs > CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES > SUBCHAPTER B—FOOD FOR HUMAN CONSUMPTION > PART 173—SECONDARY DIRECT FOOD ADDITIVES PERMITTED IN FOOD FOR HUMAN CONSUMPTION > Subpart A—Polymer Substances and Polymer Adjuvants for Food Treatment
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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.
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