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U.S. Department of Health and Human Services

Threshold of Regulation (TOR) Exemptions
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TOR number 1998-024

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: Hexamethyl disilazane-treated silica (CAS Reg. No. 68909-20-6) and hexamethyl - disilazane/divinyl tetramethyl-disilazane - treated silica (CAS Reg. No. 68988-89-6)
Use Limitations*: As components of antifoam formulations used in the manufacture of the following food-contact articles (i.e., paper, adhesives, and polymer coatings destined for use on paper and metal substrates) provided the maximum use level does not exceed 0.005% by weight.
Requestor: Technology Sciences Group, Inc. on behalf of Wacker Silicones/Wacker Chemie GmbH.

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