Bromacil
Title: Bromacil
CAS Registry Number: 314-40-9
CAS Name: 5-Bromo-6-methyl-3-(1-methylpropyl)-2,4(1H,3H)-pyrimidinedione
Additional Names: 5-bromo-3-sec-butyl-6-methyluracil; 5-bromo-6-methyl-3-(1-methylpropyl)uracil
Manufacturers' Codes: Du Pont Herbicide 976
Trademarks: Hyvar (DuPont); Uragon (Makhteshim-Agan); Urox B (Hopkins)
Molecular Formula: C9H13BrN2O2
Molecular Weight: 261.12
Percent Composition: C 41.40%, H 5.02%, Br 30.60%, N 10.73%, O 12.25%
Literature References: Prepn: H. M. Loux, US 3235357 (1966 to du Pont). Mode of action: C. E. Hoffman, Pestic. Chem., Proc. 2nd Int. Congr. Pestic. 5, A. S. Tahori, Ed, (Gordon and Breach Science Publishers, New York, 1972) pp 65-85. Toxicology: H. Sherman, A. M. Kaplan, Toxicol. Appl. Pharmacol. 34, 189 (1975). Review: Pease, Deye, Anal. Methods Pestic. Plant Growth Regul. Food Addit. 5, 335 (1967).
Properties: White crystalline solid, mp 157.5-160°. Vapor pressure at 100°: 8 ´ 10-4 mm Hg. Soly in water at 20°: 815 mg/l. Moderately sol in strong aq bases, acetone, acetonitrile, ethanol. LD50 orally in rats: 5200 mg/kg (Sherman, Kaplan).
Melting point: mp 157.5-160°
Toxicity data: LD50 orally in rats: 5200 mg/kg (Sherman, Kaplan)
CAUTION: Potential symptoms of overexposure are irritation of eyes, skin and upper respiratory system. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 32.
Use: Herbicide.

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