Pyraquinate
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[4-[3-(3-chlorophenyl)-1,5-dimethyl-2,4-dioxoquinazoline-6-carbonyl]-2,5-dimethylpyrazol-3-yl] N,N-diethylcarbamate | |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Pyraquinate is a chemical herbicide. It is a benzoylpyrazole, having a central functional group that includes a benzoyl group combined with pyrazole,[1] and is in the class of 4-hydroxyphenylpyruvate dioxygenase inhibiting herbicides.[2] Its formula is C27H28ClN5O5.[3]
The herbicide was patented in 2022, but only released to market in 2025.[4] It is not approved for use in any European Union countries. Under HRAC classification, it is placed in class F2.[5]
Several crystalline forms of pyraquinate are known. The commercially available form, as well as several of its polymorphs, has a triclinic crystal system.[6]
Uses
[edit]Pyraquinate was developed for use in the treatment of rice-growing paddy fields to reduce the incidence of moleplant.[4] The product, manufactured by Shandong Cynda Chemical Co., Ltd., was approved for use in China on September 17, 2024.[7] Other plants that pyraquinate is effective against are Leptochloa panicea, various Echinochloa species, Eragrostis japonica, Lecrsia oryzoides, and Paspalum distichum.[8]
References
[edit]- ^ "Pyraquinate". BCPC Pesticide Compendium. British Crop Protection Council. Retrieved August 22, 2025.
- ^ Jiao, Bin; Wang, Kuan; Chang, Yiming; Dong, Fengshou; Pan, Xinglu; Wu, Xiaohu; Xu, Jun; Liu, Xingang; Zheng, Yongquan (March 15, 2023). "Photodegradation of the Novel Herbicide Pyraquinate in Aqueous Solution: Kinetics, Photoproducts, Mechanisms, and Toxicity Assessment". Journal of Agricultural and Food Chemistry. 71 (10): 4249–4257. Bibcode:2023JAFC...71.4249J. doi:10.1021/acs.jafc.2c07813. ISSN 0021-8561. PMID 36877166.
- ^ "Pyraquinate". PubChem. National Center for Biotechnology Information. Retrieved August 22, 2025.
- ^ a b "Cynda's patented herbicide pyraquinate released to market". Agropages. March 13, 2025. Retrieved August 22, 2025.
- ^ "Pyraquinate". PPDB: Pesticide Properties DataBase. University of Hertfordshire. Retrieved August 22, 2025.
- ^ Wei, Ximeng; Han, Yuteng; Yang, Wenchao; Niu, Xiaofang; Li, Jinyang; Yang, Guang-Fu; Yang, Jingxiang (October 16, 2024). "Polymorphism-Dependent Herbicidal Activity of Pyraquinate". Crystal Growth & Design. 24 (20): 8334–8344. doi:10.1021/acs.cgd.4c00831. ISSN 1528-7483.
- ^ "12 New Pesticide Products, Including Pyraquinate, Registered in China". www.cirs-group.com. October 8, 2024. Retrieved August 22, 2025.
- ^ "Pyraquinate, an herbicide created in China to break through the worldwide bottleneck of lack of safety of HPPD herbicides for application to indica rice". Agropages. August 11, 2023. Retrieved August 22, 2025.