[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]
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