Laboratoire Phytocontrol offers COFRAC-accredited analysis of chlorothalonil and its metabolites (Chlorothalonil 4-hydroxy, Chlorothalonil R471811, Chlorothalonil SA) in fresh waters. <\/b><\/p>\n\n\n\n
Chlorothalonil is a fungicide commonly used in agriculture to combat various fungal diseases affecting crops. It is particularly effective against a wide variety of pathogenic fungi, responsible for mildew, leaf spot and rot.<\/p>\n\n\n\n
However, the use of chlorothalonil has been banned in the European Union since 2020. After application to crops, this active substance degrades into several metabolites, including chlorothalonil-R471811, chlorothalonil 4-hydroxy, chlorothalonil SYN507900 and chlorothalonil SA.<\/p>\n\n\n\n
In addition, although chlorothalonil is not very soluble in water, its metabolite chlorothalonil R471811 is very persistent in aquatic environments. In an opinion dated January 26, 2022 (Saisine n\u00b0 “2021-SA-0020-b”), ANSES classified chlorothalonil R471811 as a relevant metabolite, indicating that it could represent a risk to human health. It is important to remember that the decree of January 11, 2007, and its successive amendments, set a quality limit of 0.1 \u00b5g\/L for pesticides and relevant metabolites in water intended for human consumption (EDCH).<\/p>\n\n\n\n