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U.S. Department of Health and Human Services

Final Rules: Food Additives and Color Additives
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Petition(s): FAP 9B4123

Secondary Direct Food Additives Permitted In Food for Human Consumption; Perfluorinated Ion Exchange Membranes

Petitioner: E. I. du Pont de Nemours and Co.
Docket number (legacy and/or former docket number(s)): (89F-0031)
Subject additive and intended use: amending the food additive regulations to provide for the safe use of a perfluorinated ion exchange membrane intended for repeated use in the treatment of bulk quantities of liquid foods at temperatures up to 70°C (158°C). The membrane is a copolymer of ethanesufonyl fluoride, 2-[1-[difluoro-[(trifluoroethenyl)oxy]methyl]-1,2,2,2-tetrafluoroethoxy]-1,1,2,2,-tetrafluoro with tetrafluoroethylene that is subsequently treated to hydrolyze the sulfonyl fluoride group to the sulfonic acid.
21 CFR* affected: 173.21; Perfluorinated Ion exchange membranes
Substance(s)*, (CAS Registry® No.):
  • 2-[1-[difluoro(trifluoroethenyl)oxy]methyl]-1,2,2,2-tetrafluoroethoxy]-1,1,2,2,-tetrafluoro-, polymer with tetrafluoroethene, (31175-20-9)
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    Federal Register publication history: Feb 21, 1989; 54 FR 7519; Notice
    Apr 4, 1994; 59 FR 15623; Final Rule; Effective date: Apr 4, 1994


     

    *Definitions

    • 21 CFR: Title 21 of the Code of Federal Regulations.
    • Substance: The name of the substance listed in the CFR.
    • CAS Registry® No.: Chemical Abstract Service (CAS) Registry Number® for the substance.
    • Petitions (see also Questions and Answers About the Petition Process)
      • FAP: Food Additive Petition
      • CAP: Color Additive Petition
      • GRP: GRAS Affirmation Petition (replaced by GRAS Notification Program in 1998)
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