89300-29-8

Basic information

• Product Name: DICAMBA, [RING-14C(U)]
• Synonyms: DICAMBA, [RING-14C(U)];3,6-Dichloro-2-methoxybenzoic acid, Dicamba-ring-ul-14C;Dicamba-(ring-UL-14C)
• CAS NO: 89300-29-8
• Molecular Formula: C8H6Cl2O3
• Molecular Weight: 233.15
• Mol File: 89300-29-8.mol
• Article Data: 37

Chemical Properties

• Appearance: /
• Storage Temp.: 2-8°C
• CAS DataBase Reference: DICAMBA, [RING-14C(U)](CAS DataBase Reference)
• NIST Chemistry Reference: DICAMBA, [RING-14C(U)](89300-29-8)
• EPA Substance Registry System: DICAMBA, [RING-14C(U)](89300-29-8)

Safety Data

• Hazard Codes: F,T
• Statements: 11-23/24/25-36/37/38
• Safety Statements: 16-26-36/37/39-45
• RIDADR: UN 2910 7
• Hazardous Substances Data: 89300-29-8(Hazardous Substances Data)

Upstream product

• 74-87-3 methylene chloride 
• 108-88-3 toluene 
• 95-46-5 2-methylphenyl bromide 
• 124-41-4 sodium methylate 
• 65-85-0 benzoic acid 
• 106-46-7 para-dichlorobenzene 
• 2200-85-3 5-bromo-3-chloro-2-hydroxybenzoic acid 
• 69-72-7 salicylic acid 
• 89-55-4 5-bromosalicyclic acid 
• 120-82-1 1,2,4-Trichlorobenzene 
• 3401-80-7 3,6-dichloro-2-hydroxybenzoic acid 
• 77-78-1 dimethyl sulfate 
• 95-82-9 2,5 dichloroaniline 
• 2905-69-3 methyl 2,5-dichlorobenzoate 

Downstream Products

• 1430102-88-7 dicamba phthalhydrazide diester 
• 1918-00-9 3,6-dichloro-2-methoxybenzoate sodium salt 
• 1354726-19-4 trimethyltetradecylammonium 3,6-dichloro-2-methoxybenzoate 
• 1431852-91-3 C₈H₆Cl₂O₃*C₁₀H₁₀N₂ 

Relevant articles and documents

A catalytic oxidation of the synthesis of the herbicide dicamba 2 - methoxy - 3, 6 - II [...] method

The invention relates to a method for synthetizing a herbicide-dicamba (2-methoxy-3,6-dichloro-salicylic acid) through catalytic oxidation. The method is characterized in that the dicamba is obtained through oxidation of air, oxygen or ozone by taking 2-substituent 3,6-banair as a raw material and adopting a composite catalyst. The method disclosed by the invention has the advantages that the operation is simple, the raw material is easy to obtain, the cost is low, the catalyst can be recycled, and the method is more environment-friendly and is more suitable for industrial production.

Preparation methods of 2-bromo-3,6-dichlorobenzoic acid and dicamba

The invention provides a preparation method of dicamba. The preparation method comprises the following steps: S1), in the presence of a catalyst, 2-bromobenzoic acid is subjected to a chlorination reaction in chlorosulfonic acid or concentrated sulfuric acid, and 2-bromo-3,6-dichlorobenzoic acid is obtained; S2), 2-bromo-3,6-dichlorobenzoic acid is subjected to a methoxylation reaction, and dicamba is obtained. Compared with the prior art, 2-bromo-3,6-dichlorobenzoic acid is obtained from 2-bromobenzoic acid after the directional chlorination reaction, and dicamba can be obtained by the methoxylation reaction. The methods have the advantages of easily available raw materials, low comprehensive cost, high methoxylation reaction selectivity, high total yield, stable product quality and simple process, and facilitate industrial implementation.

Preparation method of dicamba

The invention provides a preparation method of dicamba. The preparation method comprises the steps as follows: A) salicylic acid and bromine or hydrogen bromide are subjected to a reaction in concentrated sulfuric acid, 5-bromosalicylic acid is obtained; B) 5-bromosalicylic acid and chlorine are subjected to a chlorination reaction, 5-bromo-3,6-dichlorosalycylic acid is obtained; C) 5-bromo-3,6-dichlorosalycylic acid is subjected to a debromination reaction under the alkaline condition and under the action of metal powder, and 3,6-dichlorosalycylic acid is obtained; D) 3,6-dichlorosalycylic acid and halomethane are subjected to an etherification reaction in a mixed solvent of water and methanol, and methyl-3,6-dichloro-2-methoxybenzoate is obtained; E) methanol is removed by distillation;F) a system after distillation is left to stand for laying, an organic phase is distilled, and dicamba methyl ester is obtained; G) dicamba methyl ester is subjected to alkaline hydrolysis, acidification and drying, and dicamba is obtained. The route comprises few steps and has low difficulty, the equipment requirement and investment are lower, continuous production can be realized, no three wastes are produced, and the product yield and purity are higher.