2,4-DICHLOROPHENOXYACETIC ACID

Packing:25kg or 50kg or ton bag into pallets.

Specification:  CAS NO.:94-75-7;

Appearance:white crystal powder Assay： 99.00 min. by HPLC IR Identity: conform to standard HNMR： conform to standard carbon spectrum: conform to standard Water by K. F.:0.5% max or as per the customer’s request Loss on drying:0.5% max. or as per the customer’s request

Used mainly in

Herbicide: used to prevent and control broad-leaved weeds, suitable for grass crops such as rice, wheat, corn, sugarcane, lawn, etc. It is ineffective against grass weeds.

Plant growth regulators: At low concentrations (1-30 ppm), they can:

Stimulate crop growth

Protecting flowers and fruits

Promote fruit enlargement

Inducing seedless fruit formation

Preservatives: China allows the use of preservatives for fruits and vegetables, with a maximum usage of 0.01 g/kg and residual levels ≤2.0 mg/kg.

Organic analytical standards: used for deciding elements such as thorium.

Industrial intermediates: used for synthesizing other phenoxycarboxylic acid pesticides or pharmaceutical derivatives

Synthesis lines:

The main industrial synthesis methods for 2,4-D are as follows:

1. Classic condensation method (most commonly used):

Starting from phenol, 2,4-dichlorophenol is first chlorinated to form 2,4-dichlorophenol;

o 2, 4-Dichlorophenol undergoes nucleophilic substitution reaction with chloroacetic acid under alkaline conditions (such as NaOH) to produce 2,4-D sodium salt;

Finally, 2,4-D raw material is obtained by acidification (such as using HCl).

Reaction formula:

C₆H₅OH →Cl₂ →2,4-Cl₂C₆H₃OH →ClCH₂COONa/NaOH →2,4-Cl₂C₆H₃OCH₂COONa →H⁺ →2,4-D

2. Alternative routes (mentioned in some literature):

Phenol first condenses with chloroacetic acid to form phenoxyacetic acid, and then undergoes chlorination;

Or adopt new green processes, such as using N-chlorosulfonylamide reagents to directly chlorinate aromatic rings