Chemistry:Pyraquinate
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 C
27H
28ClN
5O
5.[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
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
- ↑ "Pyraquinate". British Crop Protection Council. http://www.bcpcpesticidecompendium.org/pyraquinate.html.
- ↑ Jiao, Bin; Wang, Kuan; Chang, Yiming; Dong, Fengshou; Pan, Xinglu; Wu, Xiaohu; Xu, Jun; Liu, Xingang et al. (2023-03-15). "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. doi:10.1021/acs.jafc.2c07813. ISSN 0021-8561. PMID 36877166. Bibcode: 2023JAFC...71.4249J. https://doi.org/10.1021/acs.jafc.2c07813.
- ↑ Template:Cite PubChem
- ↑ 4.0 4.1 "Cynda's patented herbicide pyraquinate released to market" (in en). 13 March 2025. https://news.agropages.com/News/Detail-53281.htm.
- ↑ "Pyraquinate". University of Hertfordshire. https://sitem.herts.ac.uk/aeru/ppdb/en/Reports/3551.htm.
- ↑ Wei, Ximeng; Han, Yuteng; Yang, Wenchao; Niu, Xiaofang; Li, Jinyang; Yang, Guang-Fu; Yang, Jingxiang (2024-10-16). "Polymorphism-Dependent Herbicidal Activity of Pyraquinate". Crystal Growth & Design 24 (20): 8334–8344. doi:10.1021/acs.cgd.4c00831. ISSN 1528-7483. https://doi.org/10.1021/acs.cgd.4c00831.
- ↑ "12 New Pesticide Products, Including Pyraquinate, Registered in China" (in en). 2024-10-08. http://www.cirs-group.com/en/agrochemicals/12-new-pesticide-products-including-pyraquinate-registered-in-china.
- ↑ "Pyraquinate, an herbicide created in China to break through the worldwide bottleneck of lack of safety of HPPD herbicides for application to indica rice" (in en). 11 August 2023. https://news.agropages.com/News/Detail-47391.htm.
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