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U.S. Department of Health and Human Services

Threshold of Regulation (TOR) Exemptions
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TOR number 1997-018

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: Phenol red (CAS Reg. No. 143-74-8), cresol red (CAS Reg. No. 1733-12-6) and m-cresol purple (CAS Reg. No. 2303-01-7)
Use Limitations*: Phenol red, cresol red, and m-cresol purple, either alone or as a mixture at a maximum level of 2 µg, as components of ""freshness sensor"" labels that would contact meat, fish, and poultry as well as juice and dairy beverages at refrigerated temperatures. Before use, the backing would be removed and the label applied to food packaging composed of either polyvinyl chloride (PVC) or linear low density polyethylene (LDPE). Therefore, under the intended use conditions, the dye would always be separated from food by PVC or LDPE.
Requestor: McDermott, Will and Emery

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