Ethofumesate

Title: Ethofumesate
CAS Registry Number: 26225-79-6
CAS Name: 2-Ethoxy-2,3-dihydro-3,3-dimethyl-5-benzofuranol methanesulfonate
Manufacturers' Codes: NC-8438
Trademarks: Nortron (Bayer CropSci.); Tramat (Bayer CropSci.)
Molecular Formula: C13H18O5S
Molecular Weight: 286.34
Percent Composition: C 54.53%, H 6.34%, O 27.94%, S 11.20%
Literature References: Prepn: P. S. Gates et al., US 3689507 (1972 to Fisons). Biological properties and use: R. K. Pfeiffer, 3rd Symp. New Herbic. 1969, 1. Toxicity data: Anal. Ref. Standards Suppl. Data (PB85-143766, 1984) p 55. Field studies in grass: G. E. Coats, J. V. Krans, Weed Sci. 34, 930 (1986); B. J. Johnson et al, HortScience 24, 102 (1989). HPLC determn in plant, soil, water: M. A. Alawi, Anal. Lett. 23, 1695 (1990).
Properties: White crystalline solid, mp 70-72°. Vapor pressure at 25°: 8.6´10-7 mbar. Soly in water at 25°: 110 ppm. Relatively stable in water. LD50 orally in rats: 1130 mg/kg (PB85-143766).
Melting point: mp 70-72°
Toxicity data: LD50 orally in rats: 1130 mg/kg (PB85-143766)
Use: Herbicide.
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