Prepn: B. Puetzer, US 2213474 (1940 to Winthrop Chem. Co.). Degradation study: M. C. Goldberg, R. L. Wershaw, Prepr. Pap. Natl. Meet., Div. Water, Air Waste Chem., Am. Chem. Soc. 5, 53 (1965). Mechanism of action: E. Somers, R. J. Pring, Ann. Appl. Biol. 58, 457 (1966). Toxicology: G. J. Levinskas et al., Toxicol. Appl. Pharmacol. 3, 127 (1961); to aquatic organisms: A. Hourdakis et al., Fresenius Environ. Bull. 4, 679 (1995). Determn by titration in formulations: N. R. Pasarela, J. Assoc. Off. Anal. Chem. 52, 1292 (1969); by GLC in fruit: J. Hajslová et al., J. Chromatogr. 348, 437 (1985). Field trial on apple trees: R. G. Ross et al., Can. J. Plant Sci. 49, 655 (1969).