Title: Flurprimidol
CAS Registry Number: 56425-91-3
CAS Name: a-(1-Methylethyl)-a-[4-(trifluoromethoxy)phenyl]-5-pyrimidinemethanol
Additional Names: a-isopropyl-a-[p-(trifluoromethoxy)phenyl]-5-pyrimidinemethanol
Manufacturers' Codes: Compd 72500; EL-500
Trademarks: Cutless (SePRO)
Molecular Formula: C15H15F3N2O2
Molecular Weight: 312.29
Percent Composition: C 57.69%, H 4.84%, F 18.25%, N 8.97%, O 10.25%
Literature References: Growth regulator for use on established turfgrass. Prepn: R. L. Benefiel, BE 815245 (1974 to Lilly), C.A. 83, 97354t (1975); R. L. Benefiel, E. V. Krumkalns, US 3967949, US 4002628 (1976, 1977 both to Lilly). Growth retardant properties, effect on turfgrass: L. G. Thompson, Proc. West. Soc. Weed Sci. 35, 113 (1982). Effect on Kentucky bluegrass, comparison with other growth retardants: T. L. Watschke, Proc. Annu. Meet. Northeast. Weed Sci. Soc. 35, 322 (1981); N. E. Christians, J. Am. Soc. Hortic. Sci. 110, 765 (1985). Long term study of effect on bluegrass-fescue turf: P. H. Dernoeden, Agron. J. 76, 807 (1984). Efficacy in dwarfing southern pine seedlings: R. C. Hare, Can. J. For. Res. 14, 123 (1984).
Properties: Non-volatile white crystals, mp 94-96°. Sol in acetone, ethanol, methanol, DMSO, diethyl ether. LD50 dermally in rabbits: >2000 mg/kg (Thompson).
Melting point: mp 94-96°
Toxicity data: LD50 dermally in rabbits: >2000 mg/kg (Thompson)
Use: Growth retardant for grasses.

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