Chlorothalonil

Chlorothalonil, also known as tetrachloroisophthalonitrile, is an agricultural fungicide. Chlorothalonil containing products are sold under the names Bravo, Echo, and Daconil. It was first registered for use in the US in 1966. In 1997, the most recent year for which data is available, it was the third most used fungicide in the US, behind only sulfur and copper, with some 12 million lbs used in agricultural alone that year. Including non-agricultural uses, the EPA estimates that on average almost 15 million lbs were used in annually from 1990-1996.

Uses
In the US, chlorothalonil is used predominantly on peanuts, potatoes, tomatoes. It also used on golf courses and lawns and as an additive in some paints.