3138. Difenzoquat

Nomenclature

CAS number: 49866-87-7
1,2-Dimethyl-3,5-diphenyl-1H-pyrazolium.
[C17H17N2]+.

Description and references

Post-emergence herbicide for food crops; also effective vs mildew. Prepn of salts: B. Walworth, E. Klingsberg, DE 2260485; eidem, US 3882142 (1973, 1975 both to Am. Cyanamid); B. Cross et al., J. Heterocycl. Chem. 17, 905 (1980). Physical properties and herbicidal activity: N. E. Shafer, Proc. 12th Br. Weed Control Conf. 1974, 831. Effect vs mildew: R. J. Winfield et al., Proc. Br. Crop Prot. Conf. - Pests Dis. 1977, 57. HPLC determn in commercial formulations: C. Barry, R. K. Pike, J. Assoc. Off. Anal. Chem. 63, 64 (1980); in water: M. C. Carneiro et al., J. Chromatogr. A 669, 217 (1994).

Chemical structure

Derivative

Methyl sulfate.

Nomenclature

CAS number: 43222-48-6
AC-84777; CL-84777; Avenge (BASF); Finaven (BASF).
C17H17N2.CH3O4S; mol wt 360.43.
C 59.98%, H 5.59%, N 7.77%, O 17.76%, S 8.90%.

Properties

Crystals from acetone, mp 146-148° (Cross). Soly in water (25°): ≈70%. Relatively insol in non-polar solvents. LD50 (technical grade) orally in rats: 470 mg/kg; dermally in rabbits: 3540 mg/kg (Shafer).

Use

Herbicide; agricultural fungicide.