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Packagers tell insects: 'Stop bugging us!'

New EPA rule simplifies the procedures for gaining a tolerance exemption.Arrival of insect repellent approved for use in food packaging heralds new era of chemical coatings that ward off bugs and germs.

Packagers of dry foods may soon be hanging "Insects keep out" labels on their paperboard boxes. The Environmental Protection Agency (EPA) is set to approve the first-ever registration of an insect repellent for food packaging, in this case a product called RepelKote(TM) from Pactiv Inc. (Lake Forest, IL).

Methyl salicylate, the active ingredient, is a synthetic version of naturally occurring wintergreen oil. It is already used in a number of food products. But because Pactiv wants to use it as an insecticide, the product fell under the jurisdiction of the Federal Insecticide, Fungicide and Rodenticide Act (FIFRA).

Bob Torla, the EPA official handling the Pactiv petition, says the EPA has granted the company a technical registration, which allows it to process the methyl salicylate into a product and ship supplies of it from place to place. The only thing EPA needs to do before granting Pactiv final approval is make sure the Food and Drug Administration has approved other components in the packaging for use with food. That is more a formality than anything else, Packaging World is told.

The EPA expects many more applications from companies seeking to register biochemicals and biocides. Under current rules, the EPA must publish a rule exempting the company from getting an EPA tolerance for the pesticide in the food packaging. The EPA normally has to set a tolerance level for a pesticide, both for its levels in food, and its levels in the individual packaging components, which are considered "inert" ingredients.

Establishing a tolerance can take several years. But now the EPA is doing away with the requirement for publishing a tolerance exemption for the packaging materials. The agency published a direct final rule on March 4 that exempts certain inert ingredients from the definitions of "pesticide chemical." The exception applies to inert ingredients that are components of food packaging, such as paper and paperboard, coatings, adhesives and polymers. The action became final on May 4, 1998. The EPA retains the responsibility for approving tolerances for active ingredients in food.

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