[Code of Federal Regulations]
[Title 21, Volume 3]
[Revised as of April 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 21CFR173.50]

[Page 124]
 
                        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 
CONSUMPTION--Table of Contents
 
  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.