[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: 21CFR177.2210]
[Page 333]
TITLE 21--FOOD AND DRUGS
CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN
SERVICES (CONTINUED)
PART 177 INDIRECT FOOD ADDITIVES: POLYMERS--Table of Contents
Subpart C Substances for Use Only as Components of Articles Intended for
Repeated Use
Sec. 177.2210 Ethylene polymer, chloro sulfonated.
Ethylene polymer, chlorosulfonated as identified in this section may
be safely used as an article or component of articles intended for use
in contact with food, subject to the provisions of this section.
(a) Ethylene polymer, chloro sulfonated is produced by chloro
sulfonation of a carbon tetrachloride solution of polyethylene with
chlorine and sulfuryl chloride.
(b) Ethylene polymer, chloro sulfonated shall meet the following
specifications:
(1) Chlorine not to exceed 25 percent by weight.
(2) Sulfur not to exceed 1.15 percent by weight.
(3) Molecular weight is in the range of 95,000 to 125,000.
Methods for the specifications in this paragraph (b), titled ``Chlorine
and Bromine--Coulometric Titration Method by Aminco Chloridometer,''
``Hypolon [reg] Synthetic Rubber--Determination of Sulfur by
Parr Bomb,'' and ASTM method D2857-70 (Reapproved 1977), ``Standard Test
Method for Dilute Solution Viscosity of Polymers,'' are incorporated by
reference. Copies of the ASTM method may be obtained from the American
Society for Testing Materials, 100 Barr Harbor Dr., West Conshohocken,
Philadelphia, PA 19428-2959. Copies of the other two methods are
available from the Center for Food Safety and Applied Nutrition (HFS-
200), Food and Drug Administration, 5100 Paint Branch Pkwy., College
Park, MD 20740. Copies of all three methods may be examined 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.
(c) The additive is used as the article, or a component of articles,
intended for use as liners and covers for reservoirs intended for the
storage of water for drinking purposes.
(d) Substances permitted by Sec. 177.2600 may be employed in the
preparation of ethylene polymers, chlorosulfonated, subject to any
limitations prescribed therein.
(e) The finished ethylene copolymers, chlorosulfonated shall conform
to Sec. 177.2600(e) and (g).
[42 FR 14572, Mar. 15, 1977, as amended at 49 FR 10111, Mar. 19, 1984;
54 FR 24898, June 12, 1989]
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