Thiometon (Bayer 23655) [0,0-Dimethyl S-isopropyl-2-sulfinylethyl 
phosphorothiolate ] 
Thiometon is similar to demeton S and its metabolism was also 
similar. Thiometon penetrated and translocated rapidly into citrus and 
rice plants. After penetration, thiometon underwent oxidization to the 
sulfone and hydrolysis to the phosphoric and dimethyl phosphoric acids 
(1414). 
Under the influence of ultraviolet light (maximum of 2540 A), 
thiometon gave rise to the sulfone and sulfoxide (1608). 
O CH 0 QO CH 0 
| 0 ts ot | T ie 1 
(CHO) .-P-S—CH-CH, -S—CH.,-CH , 3» (CH.0) ,-P-S- iaticaer ae tae 
0 
Thiometon Thiometon Sulfone 
a 
(CH,.0) .-P-OH 
Dimethyl Phosphoric 
Acid 
Y 
HPO), 
Phosphoric Acid 
306 
