10316. Tritosulfuron

Nomenclature

CAS number: 142469-14-5
N-[[[4-Methoxy-6-(trifluoromethyl)-1,3,5-triazin-2-yl]amino]carbonyl]-2-(trifluoromethyl)benzenesulfonamide; 1-(4-methoxy-6-trifluoromethyl-1,3,5-triazin-2-yl)-3-(2-trifluoromethylbenzenesulfonyl)urea; BAS-635; Biathlon (BASF); Tooler (BASF).
C13H9F6N5O4S; mol wt 445.30.
C 35.06%, H 2.04%, F 25.60%, N 15.73%, O 14.37%, S 7.20%.

Description and references

Post-emergence sulfonylurea herbicide for use in food crops; acetolactate synthase inhibitor. Prepn: H. Mayer et al., DE 4038430; eidem, US 5478798 (1992, 1995 both to BASF). Skin penetration study: B. van Ravenzwaay, E. Leibold, Hum. Exp. Toxicol. 23, 421 (2004) DOI PubMed. Toxicity, metabolism, and environmental impact: D. Barcelo Culleres et al., EFSA J. 621, 2 (2007).

Chemical structure

Properties

Crystals, mp 164-169°. Log P (octanol/water): 2.9. Soly in water (20°): 44 mg/l. LD50 in rats (mg/kg): 4700 orally; >2000 dermally. LC50 (4 hr) in rats: >5.9 mg/l (Barcelo Culleres).

Use

Herbicide.