Metham - Sodium (sodium N-methyldithiocarbamate) 
The principal product of decomposition of metham-sodium, when 
applied to soil, has been shown to be methyl isothiocyanate. This can 
then react with sulfhydryls or with ammonia to form N-methylthiourea. 
However, under outdoor conditions, this latter reaction is not significant, 
(Hughes, 1959; Lloyd, 1962; Ashley et al., 1963a,b; Sisler, 1963). 
1 
CH3-N-C-S-Na —=———-—_ CH3-N=C=S 
Metham-sodium Methyl isothiocyanate 
RSH NH3 
i i 
CH3-N-C-S-R CH3 “er ae 
N-Methyl Thiourea 
Methoxychlor (1,1,1-Trichloro-2,2-bis-[p-methoxyphenyl] ethane) 
Treatment of cows with methoxychlor apparently does not give rise 
to any residues in the milk. Im other studies some metabolites have 
been isolated; however, none have been identified (Prickett and Laug, 
1953; Lehman, 1956; Helrich et al., 1958; Cluett et al., 1960). 
2-Methoxy-3,6-Dichlorobenzoic Acid 
This compound is rapidly metabolized by wheat and bhegrass. One me- 
tabolite has been identified as 3,6-dichlorosalicylic acid. The other 
metabolite, representing 90% of the herbicide and believed to be a hydroxy- 
lated compound, has not been identified (Montgomery et al., 1966). 
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