Title: Bispyribac
CAS Registry Number: 125401-75-4
CAS Name: 2,6-Bis[(4,6-dimethoxy-2-pyrimidinyl)oxy]benzoic acid
Molecular Formula: C19H18N4O8
Molecular Weight: 430.37
Percent Composition: C 53.02%, H 4.22%, N 13.02%, O 29.74%
Literature References: Post-emergence herbicide; turfgrass growth regulator. Prepn: N. Wada et al., EP 321846; eidem, US 4906285 (1989, 1990 both to Kumiai Chem. Ind. and Ihara Chem. Ind.). Metabolism in rats: Y. Fukai et al., J. Pestic. Sci. 20, 479 (1995). Field studies in rice: M. P. Braverman, D. L. Jordan, Weed Technol. 10, 876 (1996); in turfgrass: M. J. Fagerness, D. Penner, Weed Technol. 12, 436 (1998). Review of physical properties, mode of action and efficacy: M. Yokoyama et al., Brighton Crop Prot. Conf. - Weeds 1993, 61-66.
Properties: White powder, mp 148-150°.
Melting point: mp 148-150°
Derivative Type: Sodium salt
CAS Registry Number: 125401-92-5
Manufacturers' Codes: KIH-2023; KUH-911; V-10029
Trademarks: Nominee (Kumiai)
Molecular Formula: C19H17N4NaO8
Molecular Weight: 452.35
Percent Composition: C 50.45%, H 3.79%, N 12.39%, Na 5.08%, O 28.30%
Properties: White powder, mp 228.0° (dec). Soly in water at 25°: 733 g/l. Vapor pressure at 25°: 5.05 ´ 10-9 Pa. LD50 in male, female rats (mg/kg): 4111, 2635 orally; in rats (mg/kg): >2000 dermally. LC50 in bluegill sunfish, rainbow trout (ppm): >100, >100 (Yokoyama).
Melting point: mp 228.0° (dec)
Toxicity data: LD50 in male, female rats (mg/kg): 4111, 2635 orally; in rats (mg/kg): >2000 dermally; LC50 in bluegill sunfish, rainbow trout (ppm): >100, >100 (Yokoyama)
Use: Herbicide

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