73250-68-7

Basic information

• Product Name: Mefenacet
• Synonyms: 2-(1,3-benzothiazol-2-yloxy)-n-methylacetanilide;2-(1,3-Benzothiazol-2-yloxy)-N-methyl-N-phenylacetamide;2-(2-benzothiazolyloxy)-n-methyl-n-phenyl-acetamid;foe1976;ntn801;RANCHO;MEFENACET;BATL
• CAS NO: 73250-68-7
• Molecular Formula: C₁₆H₁₄N₂O₂S
• Molecular Weight: 298.36
• EINECS: 277-328-8
• Product Categories: Alpha sort;AmidePesticides&Metabolites;Herbicides;H-MAlphabetic;M;MEA - MES;Pesticides&Metabolites
• Mol File: 73250-68-7.mol
• Article Data: 5

Chemical Properties

• Melting Point: 134.8°
• Boiling Point: 441 °C at 760 mmHg
• Flash Point: >100 °C
• Appearance: Colourless, odourtess crystals.
• Density: 1.2361 (rough estimate)
• Vapor Pressure: 5.63E-08mmHg at 25°C
• Refractive Index: 1.6000 (estimate)
• Storage Temp.: 0-6°C
• PKA: 1.53±0.10(Predicted)
• BRN: 1143987
• CAS DataBase Reference: Mefenacet(CAS DataBase Reference)
• NIST Chemistry Reference: Mefenacet(73250-68-7)
• EPA Substance Registry System: Mefenacet(73250-68-7)

Safety Data

• Hazard Codes: N
• Statements: 51/53
• Safety Statements: 61
• RIDADR: UN 3077
• WGK Germany: 2
• RTECS: AB4542550
• Hazardous Substances Data: 73250-68-7(Hazardous Substances Data)

Usage

Description

Mefenacet is an acetanilide herbicide specifically designed for the preand post-emergence control of annual weeds in paddy oil fields. It has gained widespread use and recognition in Asian countries, where it is frequently detected in river or lake water due to its extensive application in agriculture.

Uses

Used in Agriculture:
Mefenacet is used as a herbicide for the control of annual weeds in paddy oil fields. Its application helps to improve crop yield by reducing competition from weeds, ensuring a more efficient and productive agricultural system.
Used in Pest Management:
In addition to its primary use in agriculture, Mefenacet is also employed in pest management strategies. Its effectiveness in controlling annual weeds contributes to a more sustainable and environmentally friendly approach to managing pests in agricultural settings.
Used in Water Quality Monitoring:
Due to its frequent detection in river or lake water, Mefenacet serves as an indicator for monitoring water quality in regions where it is heavily used. This helps to assess the potential impact of agricultural practices on aquatic ecosystems and inform appropriate management strategies to mitigate any negative effects.

Safety Profile

A poison by inhalation.Moderately toxic by intraperitoneal and subcutaneousroutes. Low toxicity by ingestion. When heated todecomposition it emits toxic vapors of NOx and SOx.

InChI:InChI=1/C16H14N2O2S/c1-18(12-7-3-2-4-8-12)15(19)11-20-16-17-13-9-5-6-10-14(13)21-16/h2-10H,11H2,1H3

Upstream product

• 1310-58-3 potassium hydroxide 
• 615-20-3 2-chlorobenzo[d][1,3]thiazole 
• 42404-09-1 2-hydroxy-N-methyl-N-phenylacetamide 
• 934-34-9 2(3H)-Benzothiazolone 
• 29182-97-6 N-methyl-2-bromoacetanilide 
• 713135-97-8 2-iodo-N-methyl-N-phenylacetamide 
• 7797-75-3 2-fluoro-N-methyl-N-phenylacetamide 
• 137-07-5 2-amino-benzenethiol 
• 2620-05-5 N-methyl-2-chloroacetanilide 

Relevant articles and documents

Method for preparing pesticide mefenacet from benzothiazolone and 2-halo-N-methyl-N-phenylacetamide

The invention provides a method for preparing mefenacet from benzothiazolone and 2-halo-N-methyl-N-phenylacetamide. The method comprises the following steps: firstly, synthesizing benzothiazolone by taking CO2 as a carbonylation reagent, then reacting the benzothiazolone with alkali liquor to obtain a salt solution of benzothiazolone, and finally reacting the salt solution of benzothiazolone with2-halo-N-methyl-N-phenylacetamide to obtain the mefenacet. A new path is provided for industrial production of mefenacet, the synthesis route of a traditional method is shortened, chemical utilizationof CO2 is achieved, energy conservation and emission reduction are facilitated, and the method better conforms to the concept of green chemistry.

Herbicidal mixtures having a synergistic effect

PCT No. PCT/EP96/03996 Sec. 371 Date Feb. 17, 1998 Sec. 102(e) Date Feb. 17, 1998 PCT Filed Sep. 12, 1996 PCT Pub. No. WO97/10714 PCT Pub. Date Mar. 27, 1997A composition comprising at least one sulfonylurea of the formula I wherein R1 is substituted alkyl; halogen; a group ER6 (E=O, S or NR7); COOR8; NO2; S(O)oR9; SO2NR10R11; or CONR10R11; R2 is hydrogen, alkyl, alkenyl, alkynyl, halogen, alkoxy, haloalkoxy, haloalkyl, alkylsulfonyl, nitro, cyano or alkylthio; R3 is F, CF3, CF2Cl, CF2H, OCF3, OCF2Cl, or, if R1 is CO2CH3 and R2 is simultaneously fluorine, R3 is Cl, or, if R1 is CH2CF3 or CF2CF3, R3 is methyl, or, if R4 is OCF3 or OCF2Cl, R3 is OCF2H or OCF2Br; R4 is alkoxy, alkyl, alkylthio, alkylamino, dialkylamino, halogen, haloalkyl or haloalkoxy; and R5 is hydrogen, alkoxy or alkyl; or an enviromentally compatible salt of I, and an aryloxyalkanoic acid selected from the group consisting of 2,4-D, 2,4-DB, clomeprop, dichlorprop, dichlorprop-P, dichlorprop-P (2,4-DP-P), fenoprop (2,4,5-TP), fluoroxypyr, MCPA, MCPB, mecoprop, mecoprop-P, napropamide, napropanilide, triclopyr, and an enviromentally compatible salt thereof exhibits a synergistic herbicidal effect.

Benzothiazole substituted carboxylic acid amide compounds and herbicidal methods compositions thereof

Novel substituted carboxylic acid amide compound of the formula STR1 wherein n is an integer from 1 to 4 each R is independently selected from hydrogen, halogen, alkyl, haloalkyl, alkoxy, haloalkoxy, alkylthio, haloalkylthio, amino, alkylamino, dialkylamino, nitro, cyano and alkoxycarbonyl; and two R radicals taken together can represent methylenedioxy, dichloromethylenedioxy or difluoromethylenedioxy, R1 is hydrogen or alkyl, R2 and R3 are individually selected from hydrogen or a radical selected from alkyl, alkenyl, alkynyl, aralkyl, cycloalkyl, aryl and nitrogen-containing heterocycles, each of which radicals may be substituted and each of which radicals may, together with the nitrogen atom to which they are attached, form an optionally substituted, optionally partially unsaturated and optionally benzofused monocyclic or bicyclic radical, which may contain one or more further hetero-atoms, and X is oxygen or sulfur.