Pyraquinate is a chemical herbicide. It is a benzoylpyrazole, having a central functional group that includes a benzoyl group combined with pyrazole, and is in the class of 4-hydroxyphenylpyruvate dioxygenase inhibiting herbicides. Its formula is C27H28ClN5O5. The herbicide was patented in 2022, but only released to market in 2025. It is not approved for use in any European Union countries. Under HRAC classification, it is placed in class F2. Several crystalline forms of pyraquinate are known. The commercially available form, as well as several of its polymorphs, has a triclinic crystal system.
Uses Pyraquinate was developed for use in the treatment of rice-growing paddy fields to reduce the incidence of moleplant. The product, manufactured by Shandong Cynda Chemical Co., Ltd., was approved for use in China on September 17, 2024. Other plants that pyraquinate is effective against are Leptochloa panicea, various Echinochloa species, Eragrostis japonica, Lecrsia oryzoides, and Paspalum distichum.
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