Phosalone [0,0-Diethyl S~(6-Chloro-2-oxo-benzoxazol~3-ylmethy1) phosphoro- 
dithioate] 
Phosalone-oxon, which was formed in treated plants, degraded more 
rapidly than phosalone. In plants they were attacked hydrolytically at 
the P-S-C link. This gave the corresponding diethyl phosphorodithioic 
and diethylphosphorothioic acids and a benzoxazolone moiety. The latter 
was conjugated to form a glycoside (1792). 
In soil, initial stages were apparently the same as in plants. 
However, a red material was mserved and identified as substituted phenoxazone. 
A disulfide formed by oxidation of the phosphorodithioate (1/792). 
In rats, phosalone was rapidly metabolized when administered orally. 
Three unidentified compounds were present in the urine. When the carbonyl-C 
was labeled, 65.4% of the label appeared as !*CO> and 32.4% in urine and 
feces within four days (1792). 
S | : 
a ae a (CyH50) ,-P-CH,- 
4~ Cl of 
Phosalone-oxon 


Phosalone 
CH50 
R ' va a Q 
C)H,0),-P-SH | _p_g 
(Co f (C,H,0),-P-SH 
“ * ei! 
\ J 0” 
BSPO;, (C,H50) 52-8 
casonte J \ 34 
H,.N- “df 
© 
ll 
i?) 
— 

274 
