Sulfentrazone (CAS 122836-35-5)

Sulfentrazone, also known as F6285 or authority, is a herbicide used to control broad-leaved weeds in soya and tobacco crops. It belongs to the class of triazoles and is characterized by its structure as a 5-oxo-1,2,4-triazole with substitutions at positions 1, 3, and 4. These substitutions consist of 2,4-dichloro-5-[(methylsulfonyl)amino]phenyl, methyl, and difluoromethyl groups, respectively. As an EC 1.3.3.4 inhibitor, sulfentrazone acts on protoporphyrinogen oxidase, an enzyme involved in chlorophyll biosynthesis. By inhibiting this enzyme, it disrupts the pathway and leads to the accumulation of toxic intermediates. The herbicide is absorbed by both the roots and foliage of plants, with its primary movement occurring in the apoplasm and limited movement in the phloem. While sulfentrazone has proven effective as a herbicide, it is important to note that it is not approved for use within the European Union. Sulfentrazone falls under the categories of sulfonamides, dichlorobenzenes, organofluorine compounds, and triazoles. It is mainly located in the membrane within cells, as predicted from its logP value. It should be acknowledged that sulfentrazone is potentially toxic, and its solubility in water is considered practically insoluble. Overall, sulfentrazone′s mode of action as a herbicide, its chemical properties, and its limitations in usage highlight its significance in weed control in specific agricultural settings.