[Code of Federal Regulations]
[Title 21, Volume 3]
[Revised as of January 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 21CFR173.50]
[Page 127]
TITLE 21--FOOD AND DRUGS
CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN
SERVICES (CONTINUED)
PART 173 SECONDARY DIRECT FOOD ADDITIVES PERMITTED IN FOOD FOR HUMAN
Subpart A Polymer Substances and Polymer Adjuvants for Food Treatment
Sec. 173.50 Polyvinylpolypyrrolidone.
The food additive polyvinylpoly pyrrolidone 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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