Title: Butralin
CAS Registry Number: 33629-47-9
CAS Name: 4-(1,1-Dimethylethyl)-N-(1-methylpropyl)-2,6-dinitrobenzenamine
Additional Names: N-sec-butyl-4-tert-butyl-2,6-dinitroaniline; dibutalin
Manufacturers' Codes: Amchem 70-25; A-820
Trademarks: Amexine (CFPI); Tamex (CFPI)
Molecular Formula: C14H21N3O4
Molecular Weight: 295.33
Percent Composition: C 56.94%, H 7.17%, N 14.23%, O 21.67%
Literature References: Pre-emergence herbicide. Prepn: J. J. Damiano, DE 2058201; idem, US 3672866 (1971, 1972 both to Amchem). Activity: S. R. McLane et al., Proc. South. Weed Sci. Soc. 24, 58 (1971). Soil persistence and metabolism: P. C. Kearney et al., J. Agric. Food Chem. 22, 856 (1974). Photochemistry: J. R. Plimmer, U. I. Klingebiel, ibid. 689.
Properties: Yellow-orange crystals, mp 60-61°, bp0.5 134-136°. Vapor pressure at 25°: 1.3 ´ 10-5 mm Hg. Flash pt, open cup: 97°F (36°C). Soly in water at 25°: 1 mg/l. Soly at 25° (kg/kg): methanol 0.125; acetone 4.48; benzene 2.7; xylene 3.88; butanone 9.55; carbon tetrachloride 1.46. LD50 orally in rats: 2500 mg/kg (McLane).
Melting point: mp 60-61°
Boiling point: bp0.5 134-136°
Flash point: Flash pt, open cup: 97°F (36°C)
Toxicity data: LD50 orally in rats: 2500 mg/kg (McLane)
Use: Herbicide.

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