Simazine is a selective triazine herbicide, that used to control broad-leaved weeds and annual grasses in a field, berry fruit, vegetable and ornamental crops, on turfgrass, and in orchards and vineyards. At higher rates, it is used for nonselective weed control in industrial areas. Before 1992, simazine was used to control submerged weeds and algae in large aquariums, farm ponds, fish hatcheries, swimming pools, ornamental ponds and cooling towers. Simazine is available in wettable powder, water dispersible granule, liquid and granular formulations. Simazine is highly toxic if inhaled, moderately toxic if ingested, and slightly toxic via dermal exposure. No cases of poisoning in humans have been reported from ingestion of Simazine.

Endrin is an organochlorine pesticide used as a non-systemic insecticide, acaricide, and rodenticide for protecting grain. As a central spasmodic agent, endrin is highly toxic to humans and skin resorption is possible. Endrin is rapidly metabolized by animals and does not accumulate in fat to the same extent as other compounds with similar structures. Endrin is also damaging to the liver, kidneys and central nervous system.