3040. Dicamba

Nomenclature

CAS number: 1918-00-9
3,6-Dichloro-2-methoxybenzoic acid; 3,6-dichloro-o-anisic acid; 2-methoxy-3,6-dichlorobenzoic acid; dianat; Velsicol 58-CS-11; Banvel (BASF); Clarity (BASF).
C8H6Cl2O3; mol wt 221.04.
C 43.47%, H 2.74%, Cl 32.08%, O 21.71%.

Description and references

Sometimes misnamed methoxydichlorobenzoate. Prepn: S. B. Richter, US 3013054 (1961 to Velsicol). Metabolism: D. D. Oehler, G. W. Ivie, J. Agric. Food Chem. 28, 685 (1980). Toxicity: Bailey, White, Residue Rev. 10, 97 (1965).

Chemical structure

Properties

Crystals from pentane, mp 114-116°. Vapor pressure at 100°: 3.75 × 10-3 mm Hg. Sol in ethanol and acetone. Very slightly sol in water. LD50 orally in rats: 1040 mg/kg (Bailey, White).

Use

Herbicide.