Title: Dithiopyr
CAS Registry Number: 97886-45-8
CAS Name: 2-(Difluoromethyl)-4-(2-methylpropyl)-6-(trifluoromethyl)-3,5-pyridinedicarbothioic acid S,S-dimethyl ester
Additional Names: S,S-dimethyl 2-(difluoromethyl)-4-isobutyl-6-trifluoromethyl-3,5-pyridinedicarbothioate
Manufacturers' Codes: MON-15100; MON-7200
Trademarks: Dimension (Dow AgroSci.)
Molecular Formula: C15H16F5NO2S2
Molecular Weight: 401.42
Percent Composition: C 44.88%, H 4.02%, F 23.66%, N 3.49%, O 7.97%, S 15.98%
Literature References: Selective herbicide for weed control in turfgrass and selected crops. Prepn: L. F. Lee, EP 133612; idem, US 4692184 (1985, 1987 both to Monsanto). Herbicidal properties: M. Fujiyama, S. Yamane, Shokubutsu no Kagaku Chosetsu 24, 49 (1989), C.A. 111, 227154n (1989).
Properties: Colorless, crystalline solid with faint odor, mp 65°. vapor pressure at 25°: 4 ´ 10-6 mm Hg. Soly in water (20°): 1.38 ppm. LD50 orally in rats: >5000 mg/kg (Fujiyama, Yamane).
Melting point: mp 65°
Toxicity data: LD50 orally in rats: >5000 mg/kg (Fujiyama, Yamane)
Use: Herbicide.

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