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U.S. Department of Health and Human Services

Threshold of Regulation (TOR) Exemptions

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TOR No. 1999-013

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: Xylanases (hemicellulase enzyme preparations) manufactured by fermentation of genetically modified strains of Trichoderma Reesei
Use Limitations*: As pre-bleaching agents for wood pulp used in the manufacture of food-contact paper provided the use level does not exceed 100 Birchwood Xylanase Units (BXU)/g pulp or 100 Thermo Xylanase Units (TXU)/g pulp. ( 1 BXU or 1 TXU = 1 nanokatal)
Requestor: CanTox Incorporated on behalf of Rohm Enzyme Finland

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

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