Boscalid

Title: Boscalid
CAS Registry Number: 188425-85-6
CAS Name: 2-Chloro-N-(4¢-chloro[1,1¢-biphenyl]-2-yl)-3-pyridinecarboxamide
Additional Names: 2-chloro-N-(4¢-chlorobiphenyl-2-yl)nicotinamide; nicobifen
Manufacturers' Codes: BAS-510F
Trademarks: Cantus (BASF); Endura (BASF)
Molecular Formula: C18H12Cl2N2O
Molecular Weight: 343.21
Percent Composition: C 62.99%, H 3.52%, Cl 20.66%, N 8.16%, O 4.66%
Literature References: Broad spectrum carboxamide fungicide used to control diseases in turf, field, row, orchard, and vineyard crops. Prepn: K. Eicken et al., EP 545099; eidem, US 5589493 (1993, 1996 both to BASF). Terrestrial field dissipation study: S. H. Jackson, Pest Manage. Sci. 60, 8 (2003). Comparative field trial vs sclerotinia drop in lettuce: M. E. Matheron, M. Porchas, Plant Dis. 88, 665 (2004). Review of chemistry and toxicology: Boscalid Pesticide Fact Sheet (U.S. EPA, July 2003) 18 pp.
Properties: White crystalline solid, mp 142.8-143.8°. d 1.381. Partition coefficient (octanol/water): 915 at 21°. Soly at 20° (g/100 ml): acetone 16-20; acetonitrile 4-5; methanol 4-5; ethyl acetate 6.7-8; dichloromethane 20-25; toluene 2-2.5; 1-octanol <1. Soly in water at 20°: 6 mg/l. Vapor pressure (hPa): 7 ´10-9 at 20°; 2 ´10-8 at 25°. pH 5.5 at 23° (1% soln). LD50 in rats (mg/kg): >5000 orally; >2000 dermally (U.S. EPA).
Melting point: mp 142.8-143.8°.
Log P: Partition coefficient (octanol/water): 915 at 21°
Density: d 1.381
Toxicity data: LD50 in rats (mg/kg): >5000 orally; >2000 dermally (U.S. EPA)
Use: Fungicide.
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