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U.S. Department of Health and Human Services

Threshold of Regulation (TOR) Exemptions
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TOR number 1997-011

Threshold of Regulation Exemptions are generally applicable and are effective for the food contact substance (FCS) for the listed intended use regardless of manufacturer or supplier.
Food Contact Substance: 4,4'-(Hexafluoroisopropylidene)diphenol (bisphenol AF) (CAS Reg. No. 1478-61-1) and benzyltriphenylphosphonium bisphenol AF salt (CAS Reg. No. 75768-65-9)
Use Limitations*: Bisphenol AF at a use level of 2% by weight and benzyltriphenyl phosphonium bisphenol AF salt at a use level of 1.9% by weight as vulcanization agents in the manufacture of vinyl fluoride-hexa - fluoropropylene and vinyl fluoride-hexa - fluoropropylene - tetrafluoroethylene copolymers regulated in 21 CFR 177.2600 destined for use in the manufacture of repeat-use rubber articles that may contact all types of food at temperatures up to 250°F
Requestor: Keller and Heckman on behalf of DuPont Dow Elastomers
Quick links to regulation: 177.2600

*For references to food types and conditions of use, see Food Types & Conditions of Use for Food Contact Substances.
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