ABSTRACT

The use of paraquat is as a domestic and commercial herbicide. It is classified as a Restricted Use Pesticide by the EPA, and may only be used by commercially licensed users. The exceptions to the restriction include liquid fertilizers, and spot weed and grass spray formulations which contain small amounts of either paraquat bis(methyl sulfate) or paraquat dichloride. The dichloride salt is supplied as a 10–30% aqueous concentrate for agricultural use or as a 5% powder for domestic use.