Oryzalin
Title: Oryzalin
CAS Registry Number: 19044-88-3
CAS Name: 4-(Dipropylamino)-3,5-dinitrobenzenesulfonamide
Additional Names: 3,5-dinitro-N4,N4-dipropylsulfanilamide
Manufacturers' Codes: EL-119
Trademarks: Surflan (Dow AgroSci.)
Molecular Formula: C12H18N4O6S
Molecular Weight: 346.36
Percent Composition: C 41.61%, H 5.24%, N 16.18%, O 27.72%, S 9.26%
Literature References: Selective pre-emergence herbicide. Prepn: Q. F. Soper, US 3367949 (1968 to Lilly). Soil degradation: T. Golab et al., Pestic. Biochem. Physiol. 5, 196 (1975); E. W. Stoller, L. M. Wax, J. Environ. Qual. 6, 124 (1977). Review: O. D. Decker, W. S. Johnson, Anal. Methods Pestic. Plant Growth Regul. 8, 433 (1976).
Properties: Yellow-orange crystals, mp 137-138° (tech, 141-142°). Soly in water at 25°: 2.5 ppm. Sol in acetone, ethanol, methanol, acetonitrile; slightly sol in benzene. Practically insol in hexane. Vapor pressure at 30°: <1 ´ 10-7 mm Hg. LD50 orally in rats: >10 g/kg (Decker, Johnson).
Melting point: mp 137-138° (tech, 141-142°)
Toxicity data: LD50 orally in rats: >10 g/kg (Decker, Johnson)
Use: Herbicide.

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