The 2-Methoxy-3,6-dichlorobenzoic acid is a halogenated benzoic acid derivative which is stable to oxidation and hydrolysis. The IUPAC name of this chemical is 3,6-dichloro-2-methoxybenzoic acid. With the CAS registry number 1918-00-9, it is also named as Dicamba. The product's categories are fine chemical & intermediates; organic acids. It is white solid dissolved in a liquid carrier. It is toxic and flammable by fire. In addition, it will produce toxic chloride gas when buring, so the storage environment should be ventilate, low-temperature and dry. And keep 2-Methoxy-3,6-dichlorobenzoic acid separate from raw materials of food. It acts by increasing plant growth rate. At sufficient concentrations, the plant outgrows its nutrient supplies, and dies.

The other characteristics of this product can be summarized as: (1)ACD/LogP: 2.76; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): -0.07; (4)ACD/LogD (pH 7.4): -0.39; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 1.13; (8)ACD/KOC (pH 7.4): 1; (9)#H bond acceptors: 3; (10)#H bond donors: 1; (11)#Freely Rotating Bonds: 2; (12)Index of Refraction: 1.576; (13)Molar Refractivity: 49.65 cm³; (14)Molar Volume: 149.8 cm³; (15)Polarizability: 19.68×10^-24 cm³; (16)Surface Tension: 49.6 dyne/cm; (17)Enthalpy of Vaporization: 59.99 kJ/mol; (18)Vapour Pressure: 8.98E-05 mmHg at 25°C; (19)Rotatable Bond Count: 2; (20)Exact Mass: 219.969399; (21)MonoIsotopic Mass: 219.969399; (22)Topological Polar Surface Area: 46.5; (23)Heavy Atom Count: 13.

Preparation of 2-Methoxy-3,6-dichlorobenzoic acid: By the 1,2,4-trichlorobenzene reacts with CH₃OH / NaOH to get 2,5-dichlorophenol which reacts with CO₂ under pressure to obtain 2-hydroxy-3,6-dichloro benzoic acid. Then, we can get the product by the reaction of 2-hydroxy-3,6-dichloro benzoic acid and (CH₃)₂SO₄.

Uses of 2-Methoxy-3,6-dichlorobenzoic acid: It is an herbicide used to control brush and bracken in pastures. And it is also used to control annual and perennial rose weeds in grain crops and highlands. It will kill legumes and broadleaf weeds before and after they sprout. In combination with a phenoxyalkanoic acid or another herbicide, dicamba is used in pastures, range land, and noncrop areas (fence rows, roadways and wastage) to control weeds.

When you are using this chemical, please be cautious about it as the following: 
It is harmful by inhalation, in contact with skin and if swallowed. It is also irritating to eyes and has serious damage to the eyes, so in case of contact with eyes, rinse immediately with plenty of water and seek medical advice.. In addition, this chemical is harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment. If you want to contact this product, you must wear suitable protective clothing. Avoid release to the environment. 

People can use the following data to convert to the molecule structure.
1. SMILES:Clc1ccc(Cl)c(c1OC)C(=O)O
2. InChI:InChI=1/C8H6Cl2O3/c1-13-7-5(10)3-2-4(9)6(7)8(11)12/h2-3H,1H3,(H,11,12)

The following are the toxicity data which has been tested.