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135590-91-9 Usage


Mefenpyr-diethyl, a synthetic chemical compound, is primarily utilized in the agricultural industry as a herbicide safener. It is designed to enhance the effectiveness and selectivity of herbicides, ensuring the protection of desired crops while controlling the growth of unwanted weeds.


Used in Agriculture:
Mefenpyr-diethyl is used as a herbicide safener for modern agriculture to provide a resistant breaking solution. It is employed in herbicidal and herbicide-safener combinations, allowing for the selective control of weeds while minimizing damage to the desired crop. This application helps improve crop yield and quality, making it a valuable tool in contemporary farming practices.

Check Digit Verification of cas no

The CAS Registry Mumber 135590-91-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,5,5,9 and 0 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 135590-91:
139 % 10 = 9
So 135590-91-9 is a valid CAS Registry Number.

135590-91-9 Well-known Company Product Price

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  • TCI America

  • (M2604)  Mefenpyr-diethyl  >98.0%(HPLC)

  • 135590-91-9

  • 1g

  • 450.00CNY

  • Detail
  • TCI America

  • (M2604)  Mefenpyr-diethyl  >98.0%(HPLC)

  • 135590-91-9

  • 5g

  • 1,490.00CNY

  • Detail
  • Sigma-Aldrich

  • (46302)  Mefenpyr-diethyl  PESTANAL®, analytical standard

  • 135590-91-9

  • 46302-100MG

  • 1,062.36CNY

  • Detail



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

Version: 1.0

Creation Date: Aug 16, 2017

Revision Date: Aug 16, 2017


1.1 GHS Product identifier

Product name mefenpyr-diethyl

1.2 Other means of identification

Product number -
Other names diethyl 1-(2,4-dichlorophenyl)-4,5-dihydro-5-methyl-1H-pyrazole-3,5-dicarboxylate

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:135590-91-9 SDS

135590-91-9Downstream Products

135590-91-9Relevant articles and documents

Preparation method of mefenpyr-diethyl


, (2020/09/09)

The invention relates to a preparation method of mefenpyr-diethyl, which specifically comprises the following steps: (a) mixing ethyl 2-chloroacetoacetate, 2,4-dichloroaniline, inorganic acid and water, and then adding a sodium nitrite aqueous solution to form a reaction system, and performing diazotization and substitution reactions, so as to obtain ethyl 2-chloro-2-(2,4-dichlorobenzene diazo) acetoacetate; and (b) adding an inorganic base into the reaction system to adjust the pH value to 5-7, then adding a bicarbonate aqueous solution to carry out a hydrolysis reaction to obtain ethyl 2-chloro-2-(2,4-dichlorobenzylidenehydrazino)acetate, then sequentially adding a polymerization inhibitor, ethyl methacrylate and the bicarbonate aqueous solution to carry out cyclization, and carrying outpost-treatment to obtain the mefenpyr-diethyl. Compared with the prior art, the intermediate generated through diazotization and substitution is stable, the intermediate does not need to be separated, the method is easy and convenient to operate, reaction conditions are mild, sodium bicarbonate (or potassium bicarbonate) is used for hydrolysis, the raw material price is low, and the dosage is small.



Page/Page column 11, (2017/06/27)

A crystalline form of mefenpyr-diethyl of formula (I), the crystal preparation process, the analyses of the crystal through various analytical methods and using the crystal to prepare stable agrochemical formulation are provided. The use of various solvents towards the crystalline form preparation conditions is also provided.

Pyrazolines for protecting crop plants against herbicides


, (2008/06/13)

Compounds of the formula (I) STR1 where X, n, R1, R2 and R3 are as defined in claim 1 are suitable as antidotes against phytotoxic secondary effects of herbicides in crop plants without adversely affecting the action of the herbicides against harmful plants.

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