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U.S. Department of Health and Human Services

Threshold of Regulation (TOR) Exemptions

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TOR number 1997-002

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: 2,4-dihydro-4-((2-methoxyphenyl)azo)-5-methyl-2-phenyl-3H-pyrazol-3-one (CAS Reg. No. 4645-07-2)
Use Limitations*: As a colorant at levels up to 0.0228% by weight in foamed polystyrene used to package all types of food, including meat and poultry, at refrigerated temperatures or below (Conditions of Use F and G, Table 2, 21 CFR 176.170).
Requestor: Keller and Heckman on behalf of Reedspectrum
Quick links to regulation: 176.170

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

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