Maneb
Title: Maneb
CAS Registry Number: 12427-38-2
CAS Name: [[1,2-Ethanediylbis[carbamodithioato]](2-)]manganese
Additional Names: [ethylenebis(dithiocarbamato)]manganese; ethylenebis[dithiocarbamic acid] manganous salt; manganous ethylenebis[dithiocarbamate]
Trademarks: Dithane M-22 (Dow AgroSci.); Manex (Griffin); Trimangol (Cerexagri)
Literature References: (C4H6MnN2S4)n. Polymeric salt of ethylenebisdithiocarbamic acid; related to zineb and mancozeb, q.q.v. Prepd from aq nabam, q.v., by neutralizing with acetic acid and adding MnCl2 soln: A. L. Flenner, US 2504404 (1950 to Du Pont), see also W. F. Hester, US 2317765 (1943 to Rohm & Haas). Fungicidal activity is due to degradation products, principally ethylenethiuram monosulfide: R. A. Ludwig et al., Can. J. Bot. 33, 42 (1955). In vitro activity against Alternaria alternata: V. A. Bourbos et al., Br. Crop Prot. Counc. Monogr. 2, No. 31, 461 (1985). Decomposition of maneb to ethylenebisdithiocarbamate and ethylene thiourea, q.v.: W. J. Trotter, J. Pardue, J. Food Saf. 4, 59 (1982). HPLC determn: K. Gustafsson et al., J. Agric. Food Chem. 29, 729 (1981). Toxicological studies in rats: D. W. R. Bleyl, H. Seidler, Nahrung 29, 421 (1985); in aquatic organisms: C. J. Van Leeuwen et al., Aquat. Toxicol. 7, 145 (1985).
Properties: Yellow powder. Crystals from alcohol. Moderately sol in water. Sol in chloroform, pyridine.
Use: Agricultural fungicide.

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