18625-12-2

Basic information

• Product Name: 2,4-DB METHYL ESTER
• Synonyms: 4-(2,4-Dichlorophenoxy)butyric acid methyl ester;Butanoic acid, 4-(2,4-dichlorophenoxy)-, methyl ester;Butyric acid, 4-(2,4-dichlorophenoxy)-, methyl ester;METHYL 4-(2,4-DICHLOROPHENOXY)BUTANOATE;METHYL 4-(2,4-DICHLOROPHENOXY)BUTYRATE;2,4-DB METHYL ESTER;2,4-DB METHYL ESTER 1X1ML HEXANE 200UG/M L;2,4-DB-METHYL ESTER PESTANAL (METHYL_4-(
• CAS NO: 18625-12-2
• Molecular Formula: C₁₁H₁₂Cl₂O₃
• Molecular Weight: 263.12
• EINECS: 203-777-6
• Mol File: 18625-12-2.mol
• Article Data: 7

Chemical Properties

• Boiling Point: 353.9 °C at 760 mmHg
• Flash Point: -26 °C
• Appearance: /
• Density: 1.272 g/cm³
• Vapor Pressure: 3.48E-05mmHg at 25°C
• Refractive Index: 1.521
• Storage Temp.: 0-6°C
• BRN: 2507525
• CAS DataBase Reference: 2,4-DB METHYL ESTER(CAS DataBase Reference)
• NIST Chemistry Reference: 2,4-DB METHYL ESTER(18625-12-2)
• EPA Substance Registry System: 2,4-DB METHYL ESTER(18625-12-2)

Safety Data

• Hazard Codes: Xi,N,Xn,F
• Statements: 22-43-50/53-67-65-62-51/53-48/20-38-11
• Safety Statements: 26-29-36/37-46-60-61-62-33-16-9
• RIDADR: 2588
• WGK Germany: 3
• HazardClass: 6.1(b)
• PackingGroup: III
• Hazardous Substances Data: 18625-12-2(Hazardous Substances Data)

Usage

General Description

2,4-DB METHYL ESTER is a chemical compound that belongs to the class of phenoxy herbicides. It is a selective systemic herbicide that is commonly used to control broadleaf weeds in various crops, such as soybeans, peanuts, and alfalfa. 2,4-DB METHYL ESTER works by inhibiting the growth of susceptible plants, leading to their eventual death. It is applied as a spray or through soil incorporation, and is known for its effectiveness against weeds such as lambsquarters, pigweed, and velvetleaf. However, it is important to follow proper application and safety guidelines when using 2,4-DB METHYL ESTER to minimize potential risks to human health and the environment.

InChI:InChI=1/C11H12Cl2O3/c1-15-11(14)3-2-6-16-10-5-4-8(12)7-9(10)13/h4-5,7H,2-3,6H2,1H3

Upstream product

• 21273-27-8 methyl 2-methyl-3-phenoxybutanoate 

Relevant articles and documents

Preparation method of chlorophenoxycarboxylic ester

The invention provides a preparation method of chlorophenoxycarboxylic ester, wherein the preparation method includes the following steps: carrying out 2-site and/or 4-site selective chlorination reaction of phenoxycarboxylic ester with a chlorinating agent under the action of a catalyst A and a catalyst B to obtain chlorophenoxycarboxylic ester, wherein the catalyst A is Lewis acid, and the catalyst B is C5-22 thiazoles, isothiazoles and thiophenes or halogenated derivatives thereof. The method effectively improves the chlorination selectivity and avoids loss of effective ingredients by redesigning of the process route and fine screening of the catalysts and the chlorinating agent. The content of the obtained chlorophenoxycarboxylic ester can reach 98.5% or more and the yield can reach 99% or more.

Preparation method of chlorophenoxycarboxylic ester

The invention provides a preparation method of chlorophenoxycarboxylic ester, wherein the preparation method includes the following steps: S1) carrying out 2-site and/or 4-site selective chlorinationreaction of phenoxycarboxylic ester with a chlorinating agent under the action of a catalyst A and a catalyst B to obtain chlorophenoxycarboxylic ester, wherein the catalyst A is Lewis acid, the catalyst B is C5-22 thiazoles, isothiazoles and thiophenes or halogenated derivatives thereof, and the phenoxycarboxylic ester has any structure represented by the formulas I-IV; and S2) carrying out transesterification reaction of chlorophenoxycarboxylic ester and alcohol under the action of a catalyst to obtain long-chain chlorophenoxycarboxylic ester, wherein the alcohol has the molecular formula ofR2OH, and R2 is C4-20 alkyl or cycloalkyl. The method improves the yield and purity of chlorophenoxycarboxylic ester by redesigning of the process route and fine screening of the catalysts and the chlorinating agent. The content of the obtained chlorophenoxycarboxylic ester can reach 98.5% or more and the yield can reach 98.5% or more.

Preparation method of chlorophenoxycarboxylic ester

The invention provides a preparation method of chlorophenoxycarboxylic ester, wherein the preparation method includes the following steps: S1) carrying out 2-site and/or 4-site selective chlorinationreaction of phenoxycarboxylic ester with a chlorinating agent under the action of a catalyst A and a catalyst B to obtain chlorophenoxycarboxylic ester, wherein the catalyst A is Lewis acid, the catalyst B has the following structural formula of R1'-S-R2', and the phenoxycarboxylic ester has any structure represented by the formulas I-IV; and S2) carrying out transesterification reaction of chlorophenoxycarboxylic ester and alcohol under the action of a catalyst to obtain long-chain chlorophenoxycarboxylic ester, wherein the alcohol has the molecular formula of R2OH, and R2 is C4-20 alkyl or cycloalkyl. The method improves the yield and purity of chlorophenoxycarboxylic ester by redesigning of the process route and fine screening of the catalysts and the chlorinating agent. The content ofthe obtained chlorophenoxycarboxylic ester can reach 98.5% or more and the yield can reach 98.5% or more.