Structural Formula Vector Image
Title: Methazole
CAS Registry Number: 20354-26-1
CAS Name: 2-(3,4-Dichlorophenyl)-4-methyl-1,2,4-oxadiazolidine-3,5-dione
Additional Names: oxydiazol
Manufacturers' Codes: VCS-438
Trademarks: Paxilon (Fisons); Probe (Velsicol)
Molecular Formula: C9H6Cl2N2O3
Molecular Weight: 261.06
Percent Composition: C 41.41%, H 2.32%, Cl 27.16%, N 10.73%, O 18.39%
Literature References: Pre- and post-emergence herbicide. Prepn: J. Krenzer, ZA 6701543; idem, US 3437664 (1968, 1969 to Velsicol). Metabolism: H. W. Dorough et al., Drug Metab. Dispos. 2, 129 (1974). Persistence in the soil: W. Bond, H. A. Roberts, Weed Res. 16, 23 (1976); A. Walker, Pestic. Sci. 9, 326 (1978). Mechanism of phytotoxicity: J. Verity et al., Weed Res. 21, 243, 307, 317 (1981). Acute toxicity: T. B. Gaines, R. E. Linder, Fundam. Appl. Toxicol. 7, 299 (1986).
Properties: Light tan solid, mp 123-124°. Soly at 25°: water 1.5 ppm; xylene 55 g/l. LD50 in adult male, female rats (mg/kg): 777, 925 orally (Gaines, Linder).
Melting point: mp 123-124°
Toxicity data: LD50 in adult male, female rats (mg/kg): 777, 925 orally (Gaines, Linder)
Use: Herbicide.
Status: This monograph has been retired and is no longer subject to revision or update.

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