[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: 21CFR173.45]

[Page 126-127]
 
                        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.  173.45  Polymaleic acid and its sodium salt.

    Polymaleic acid (CAS Reg. No. 26099-09-2) and its sodium salt (CAS 
Reg. No. 70247-90-4) may be safely used in food in accordance with the 
following prescribed conditions:
    (a) The additives have a weight-average molecular weight in the 
range of 540 to 850 and a number-average molecular weight in the range 
of 520 to 650,

[[Page 127]]

calculated as the acid. Molecular weights shall be determined by a 
method entitled ``Determination of Molecular Weight Distribution of 
Poly(Maleic) Acid,'' March 17, 1992, produced by Ciba-Geigy, Inc., Seven 
Skyline Dr., Hawthorne, NY 10532-2188, which is incorporated by 
reference in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies 
are available from the Division of Product Policy, Center for Food 
Safety and Applied Nutrition (HFS-205), Food and Drug Administration, 
5100 Paint Branch Pkwy., College Park, MD 20740, or are available for 
inspection at the Center for Food Safety and Applied Nutrition's 
Library, 5100 Paint Branch Pkwy., College Park, MD 20740, or at the 
National Archives and Records Administration (NARA). For information on 
the availability of this material at NARA, call 202-741-6030, or go to: 
http://www.archives.gov/federal--register/code--of--federal--
regulations/ibr--locations.html.
    (b) The additives may be used, individually or together, in the 
processing of beet sugar juice and liquor or of cane sugar juice and 
liquor to control mineral scale.
    (c) The additives are to be used so that the amount of either or 
both additives does not exceed 4 parts per million (calculated as the 
acid) by weight of the beet or cane sugar juice or liquor process 
stream.

[51 FR 5315, Feb. 13, 1986, as amended at 61 FR 386, Jan. 5, 1996]