2802. Dalapon
Nomenclature
CAS number: 75-99-0
2,2-Dichloropropanoic acid; α,α-dichloropropionic acid. C3H4Cl2O2; mol wt 142.97.
C 25.20%, H 2.82%, Cl 49.60%, O 22.38%.
Description and references
Selective systemic herbicide for control of annual and perennial grasses. Prepn: GB 752761 (1956 to Dow); E. J. Kowolik, J. W. Fisher, GB 892584 (1962 to British Celanese); of free acid and sodium salt: Smeykal, Pallutz, Chem. Tech. (Leipzig) 15 (11), 654 (1963), C.A. 60, 6741c (1964). Acute toxicity: T. B. Gaines, R. E. Linder, Fundam. Appl. Toxicol. 7, 299 (1986). Toxicity data for the sodium salt: G. W. Bailey, J. L. White, Residue Rev. 10, 97 (1965). Quantitative NMR purity determn: R. J. Wells et al., J. Agric. Food Chem. 50, 3366 (2002).
Properties
Liquid, bp20 98-99°. d20 1.4014. nD20 1.4551. LD50 in male, female rats (mg/kg): 7126, 6936 orally (Gaines, Linder).Derivative
Sodium salt.Nomenclature
CAS number: 127-20-8
Basfapon; Dowpon; Radapon. C3H3Cl2NaO2; mol wt 164.95.
C 21.84%, H 1.83%, Cl 42.99%, Na 13.94%, O 19.40%.
Properties
Crystals, dec 174-176°. Soly in water at 25°, 45 g/100 ml; aq solns hydrolyze above 70°. Corrosive to iron.Derivative
2-(2,4,5-Trichlorophenoxy)ethyl Ester.Nomenclature
CAS number: 136-25-4
Erbon; Baron; Novon. C11H9Cl5O3; mol wt 366.45.
C 36.05%, H 2.48%, Cl 48.37%, O 13.10%.
Description and references
Prepn: H. F. Brust, H. O. Senkbeil, US 2754324 (1956 to Dow).