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U.S. Department of Health and Human Services

Threshold of Regulation (TOR) Exemptions
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TOR number 1998-013

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: Hafnium and strontium oxides
Use Limitations*: Hafnium and strontium oxides, at levels up to 3% and 0.5% by weight, respectively, in zirconium-based ceramics used as components of food-processing equipment
Requestor: Carpenter Advanced Ceramics, Inc.

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