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U.S. Department of Health and Human Services

Threshold of Regulation (TOR) Exemptions

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TOR No. 2000-002

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: 1H,3H-benzo(1,2-c:4,5-c')difuran-1,3,5,7-tetrone, polymer with 5,5'-carbonylbis(1,3-isobenzofuranedione) and 1,3-diisocyanatomethylbenzene
Use Limitations*: As a filler at a maximum use level of 20% by weight in polytetrafluoroethylene seals, bushings and bearings in food-processing equipment intended for repeated use provided the temperature does not exceed 120°F. In accordance with good manufacturing practice, those food-contact articles containing the subject additive should be thoroughly cleansed prior to their first use in contact with food.
Requestor: HP Polymer, Inc.

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