3042. Dichlobenil

Nomenclature

CAS number: 1194-65-6
2,6-Dichlorobenzonitrile; H-133; Niagara 5006; Casoron (Solvay Duphar).
C7H3Cl2N; mol wt 172.01.
C 48.88%, H 1.76%, Cl 41.22%, N 8.14%.

Description and references

Prepn: Reich, Bull. Soc. Chim. Fr. [4] 21, 217 (1917); Norris, Klemka, J. Am. Chem. Soc. 62, 1432 (1940); Chang et al., C.A. 53, 6134d (1959); Koopman, Rec. Trav. Chim. 80, 1075 (1961); Hackmann, ten Haken GB 861899; Higson, GB 862937 (both 1961 to Shell). Use as herbicide: Koopman, Daams, US 3027248 (1962 to N. A. Phillips). Fate in crops, soil and animals: Beynon, Wright, Residue Rev. 43, 23 (1972); Veroop, ibid. 55. Toxicity data: G. W. Bailey, J. L. White, ibid. 10, 97 (1965).

Chemical structure

Properties

Crystals from petr ether, mp 144-145°. Soly in water at 25°: 25 ppm; at 20°: 18 ppm. Vapor pressure at 20°: 3 × 10-6 mm Hg; at 25°: 5 × 10-4 mm. Absorption spectrum see Koopman, loc. cit. LD50 in rats, mice (mg/kg): 2710, 6800 orally (Bailey, White).

Use

Herbicide.