4699. Hexazinone

Nomenclature

CAS number: 51235-04-2
3-Cyclohexyl-6-(dimethylamino)-1-methyl-1,3,5-triazine-2,4(1H,3H)-dione; DPX-3674; Velpar (DuPont).
C12H20N4O2; mol wt 252.31.
C 57.12%, H 7.99%, N 22.21%, O 12.68%.

Description and references

Broad spectrum, pre- and post-emergence herbicide effective against woody and herbaceous weeds. Prepn: NL 7307218; J. J. Fuchs, J. B. Wommack, US 3850924; K. Lin, US 3983116 (1973, 1974, 1976 all to Du Pont). Herbicidal activity: D. A. Allison, T. D. Joyce, Proc. Brit. Weed Control Conf. 1974, 279; J. D. Riggleman, Proc. South. Weed Sci. Soc. 31, 141 (1978). Field trials: S. J. B. Hay, R. G. Jones, Proc. Symp. Methods Weed Control 1977, 139; D. E. Yarborough et al., Weed Sci. 34, 723 (1986). HPLC determn in soil and water: D. C. Bouchard, T. L. Lavy, J. Chromatogr. 270, 396 (1983). Residues in ground water: D. G. Neary, South. J. Appl. For. 7, 217 (1983). Retention and degradation in soil: K. I. N. Jensen, E. R. Kimball, Bull. Environ. Contam. Toxicol. 38, 232 (1987).

Chemical structure

Properties

White crystalline solid. mp 97-100.5°. Very soluble in water, 330 g/l at 25°. LD50 orally in rats: 1690 mg/kg (Neary).

Use

Herbicide.