Nomenclature
CAS number: 137-42-8
Methylcarbamodithioic acid sodium salt; methyldithiocarbamic acid sodium salt;
N-methylaminodithioformic acid sodium salt; sodium
N-methylaminomethanethionothiolate; metam sodium; SMDC; carbathione; trimaton; VPM.
C
2H
4NNaS
2; mol wt 129.18.
C 18.60%, H 3.12%, N 10.84%, Na 17.80%, S 49.64%.
CH
3NHCSSNa.
Description and references
Prepn: Compin, Bull.
Soc. Chim. Fr. [4] 27, 464 (1920).
Use as soil fumigant: S. C. Dorman, A. B. Lindquist, US 2766554 (1956 to Stauffer). Conversion to methyl isothiocyanate, q.v., in soil: N. J. Turner, M. E. Corden, Phytopathology 53, 1388 (1963);
J. H. Smelt, M. Leistra, Pestic. Sci. 5, 401 (1974). Field study: J. A. Bunt, Meded. Fac. Landbouwwet. Rijksuniv. Gent 42, 1529 (1977); L. P. Moreno et al., Tests
of Agrochemicals and Cultivars No. 17, (Ann. Appl. Biol. 128 Supplement), pp 6-13
(1996). Determn of efficacy: J. Krikun, Can. J. Plant Pathol. 8, 345 (1986).
Derivative
Dihydrate.
Nomenclature
N-869; Maposol (Procida); Sistan (DuPont); Vapam. Properties
Crystals, anhydr at 130°. Unpleasant odor, similar
to that of carbon disulfide. Non-flammable. Soly in water at 20°:
72.2 g/100 ml H2O. Moderately sol in alc. Sparingly sol
in other solvents. Concd aq solns are stable.Caution
Irritating to skin, mucous membranes:
Clinical Toxicology of Commercial Products, R.E. Gosselin et al., Eds. (Williams & Wilkins, Baltimore, 5th ed., 1984)
Section II, pp 312.Use
Soil fumigant to control weeds and weed seeds, nematodes,
fungi, and soil insects.