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100646-51-3 Usage


Post-emergence herbicide for control of grassy weeds in broad-leaved crops. Herbicide.

Purification Methods

This (±)-herbicide forms white crystals from Me2CO/EtOH and sublimes in vacuo. Large quantities can be distilled at high vacuum. Its solubilities at 20o in g/10mL are 0.09 (EtOH), 1.1 (Me2CO), 1.2 (xylene), 2.9 (*C6H6), and is nearly insoluble in H2O (0.3mg/L). The (±)-acid has [95977-28-9]. The R-ester enantiomer has m 76-77o (pale brown crystals from EtOH), [ ] D 20 + 3 5 . 9o (EtOH). It is the more active fatty acid synthase inhibitor (designated DPX-Y6202) used to control grassy weeds in broadleaf crops.

Check Digit Verification of cas no

The CAS Registry Mumber 100646-51-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,0,6,4 and 6 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 100646-51:
83 % 10 = 3
So 100646-51-3 is a valid CAS Registry Number.



According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 19, 2017

Revision Date: Aug 19, 2017


1.1 GHS Product identifier

Product name quizalofop-P-ethyl

1.2 Other means of identification

Product number -
Other names ethyl (2R)-2-[4-[(6-chloro-2-quinoxalinyl)oxy]phenoxy]propanoate

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:100646-51-3 SDS

100646-51-3Related news

Resistance Level and Metabolism of Barnyard-Grass (Echinochloa crusgalli (L.) Beauv.) Populations to Quizalofop-p-ethyl (cas 100646-51-3) in Heilongjiang Province, China08/12/2019

Eleven barnyardgrass populations were assayed. The highest resistant population was Geqiushan R with RI 125.45 resulted from the seed assay and 87.29 resulted from the whole plant bioassay followed by 853 R with RI 2.79 resulted from the seed assay and 6.04 resulted from the whole plant bioassay...detailed

Soaking seeds of winter rapeseed with Quizalofop-p-ethyl (cas 100646-51-3) alters plant growth and improves yield in a rice-rapeseed cropping system08/11/2019

Intercropping is an effective strategy to maximize production potential, profits, and land use efficiency. Sowing winter rapeseed in rice fields is a common cultivation technique in the Yangtze River basin in China, which is the world’s largest region for rapeseed production. However, the 10–1...detailed

A convenient method for determination of Quizalofop-p-ethyl (cas 100646-51-3) based on the fluorescence quenching of eosin Y in the presence of Pd(II)08/10/2019

A convenient fluorescence quenching method for determination of Quizalofop-p-ethyl(Qpe) was proposed in this paper. Eosin Y(EY) is a red dye with strong green fluorescence (λex/λem = 519/540 nm). The interaction between EY, Pd(II) and Qpe was investigated by fluorescence spectroscopy, resonanc...detailed

Potential Use of the Herbicide Quizalofop-p-ethyl (cas 100646-51-3) for Eicosapentaenoic Acid Overproduction by the Diatom Nitzschia laevis08/09/2019

The diatom Nitzschia laevis is a good alternative source of eicosapentaenoic acid (EPA). Besides strategies for high cell density culture, EPA productivity may be further improved by herbicides. The effect of the herbicide quizalofop-p-ethyl on the growth and EPA production is studied in this ar...detailed

Quizalofop-p-ethyl (cas 100646-51-3) exposure increases estrogen axis activity in male and slightly decreases estrogen axis activity in female zebrafish (Danio rerio)08/08/2019

The herbicide Quizalofop-P-ethyl (QpE) exerts toxic effects in fish, but limited information is currently available on its effects on the endocrine system. In the current study, adult zebrafish (Danio rerio) were exposed to different concentrations (0, 2, 20, 200 μg/L) of QpE for 30 days. In ma...detailed

A key esterase required for the mineralization of Quizalofop-p-ethyl (cas 100646-51-3) by a natural consortium of Rhodococcus sp. JT-3 and Brevundimonas sp. JT-908/07/2019

A natural consortium, named L1, of Rhodococcus sp. JT-3 and Brevundimonas sp. JT-9 was obtained from quizalofop-p-ethyl (QE) polluted soil. The consortium was able to use QE as a sole carbon source for growth and degraded 100 mg L−1 of QE in 60 h. Strain JT-3 initiated the catabolism of QE to qu...detailed

Comparison of transcriptome responses to glyphosate, isoxaflutole, Quizalofop-p-ethyl (cas 100646-51-3) and mesotrione in the HepaRG cell line08/06/2019

Use and thus exposure to quizalofop-p-ethyl, isoxaflutole, mesotrione and glyphosate, which are declared as active principles in commercial formulations of herbicides, is predicted to rapidly increase in coming years in an effort to overcome the wide-spread appearance of glyphosate-resistant wee...detailed

100646-51-3Relevant articles and documents

The enantioselective metabolic mechanism of quizalofop-ethyl and quizalofop-acid enantiomers in animal: Protein binding, intestinal absorption, and: In vitro metabolism in plasma and the microsome

Liang, Yiran,Wang, Peng,Liu, Donghui,Zhan, Jing,Luo, Mai,Han, Jiajun,Jing, Xu,Yao, Guojun,Zhou, Zhiqiang

, p. 99003 - 99009 (2016)

To investigate the metabolic mechanism and enantioselectivity of the chiral herbicide quizalofop-ethyl and its primary chiral metabolite quizalofop-acid in animals by oral administration, the effects of the processes involved in digestion, absorption, tra

A method for producing quizalofop-P-ethyl environment-friendly process (by machine translation)


, (2018/04/03)

The present invention relates to a method for producing quizalofop-P-ethyl environment-friendly process, characterized in that the first hydroquinone with sodium hydroxide reaction to prepare the sodium salt of hydroquinone, with 2, 6 - dichloro quinozaline reaction, to obtain 4 - (6 - chloro - 2 kuikui oh linlin oxygen radical) phenol, then with paratoluene sulfonic acid ethyl lactate reaction to obtain the quizalofop-P-ethyl, herbicide then the grease of the alkaline hydrolysis, acidification, recovery 6 - chloro - 2 - hydroxy-quinoxaline. The synthesis process is advantageous in that the organic solvent in the reaction and post-processing, the system reduces the response of the alkaline, avoids the strong alkaline aqueous phase reactions the drawback of easy to produce impurities, reduces the raw material 2, 6 - dichloro quinozaline hydrolysis, so that the 4 - (6 - chloro - 2 kuikui oh linlin oxygen radical) to the phenol content of 98% or more, the yield of 92% or more, the recovery of the herbicide of the grease in the 6 - chloro - 2 - hydroxy-quinoxaline, not only reduces the discharge capacity of the solid waste, the protection of the environment, reduces the quizalofop-P-ethyl intermediate cost. (by machine translation)

Preparation method of quizalofop-P-ethyl


Paragraph 0042; 0043; 0044; 0049-0051; 0055-0057, (2017/03/28)

The invention provides a preparation method of quizalofop-P-ethyl. Ethyl S(-)-tosyllactate is prepared from p-toluenesulfonyl chloride and L-ethyl lactate through a reaction, and quizalofop-P-ethyl is prepared from ethyl S(-)-tosyllactate and 6-chloro-2-(4-hydroxyphenoxy) quinoxaline through a reaction. Ethyl S(-)-tosyllactate is prepared from liquid organic tertiary amine as alkali through reaction in a solvent-free and desiccant-free system, and hydrolysis of L-ethyl lactate is avoided, so that the content of impurities in p-toluenesulfonyl chloride is reduced, the content of impurities in quizalofop-P-ethyl is further reduced, and the chemical content of obtained quizalofop-P-ethyl is 98% or higher, the optical purity is high (R/S is larger than 99/1); operating procedures are simplified, and the production cost is reduced.

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