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177.2710 Styrene-divinylbenzene resins, cross-linked.

Home > Regulations > Indirect food additives: Polymers > 177.2710 Styrene-divinylbenzene resins, cross-linked.



[Code of Federal Regulations]
[Title 21, Volume 3]
[Revised as of April 1, 2006]
From the U.S. Government Printing Office via GPO Access
[CITE: 21CFR177.2710]

[Page 354]
 
                        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.  177.2710  Styrene-divinylbenzene resins, cross-linked.

    Styrene-divinylbenzene cross-linked copolymer resins may be safely 
used as articles or components of articles intended for repeated use in 
producing, manufacturing, packing, processing, preparing, treating, 
packaging, transporting, or holding food, in accordance with the 
following prescribed conditions:
    (a) The resins are produced by the copolymerization of styrene with 
divinylbenzene.
    (b) The resins meet the extractives limitations prescribed in this 
paragraph:
    (1) The resins to be tested are ground or cut into small particles 
that will pass through a U.S. standard sieve No. 3 and that will be held 
on a U.S. standard sieve No. 20.
    (2) A 100-gram sample of the resins, when extracted with 100 
milliliters of ethyl acetate at reflux temperature for 1 hour, yields 
total extractives not to exceed 1 percent by weight of the resins.
    (c) In accordance with good manufacturing practice, finished 
articles containing the resins shall be thoroughly cleansed prior to 
their first use in contact with food.





Additives that reference this regulation:


Source: U.S. Code of Federal Regulations - CFR Title 21, Part 177, Section 2710


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