Minn. R. 4626.1655
TRACKING POWDERS; PEST CONTROL AND MONITORING. 7-206.13
A. Except as specified in item B, a tracking powder pesticide must not be used in a food establishment. P1 B. If used, a nontoxic tracking powder such as talcum or flour must not contaminate food, equipment, utensils, linens, and single-service and single-use articles.