CEPA (Amchem 66-329) [2-Chloroethylphosphonic Acid] 
Plants (Bryophyllum cruentum Baker) were treated with CEPA. The 
breakdown of CEPA into ethylene was observed. In the presence of a base, 
this breakdown appears to be second-order and apparently leads to the 
production of phosphonate and chloride (1750). 
: 2Na0W 2 
= ad _p— SNS as —_~D—l~ ” 
Cl CH, CH, OH CH, CH +H : 0 + Cl 4 
OH OH 
CEPA Ethylene 
Chlorothion [0,0-Dimethyl 0-(3-chloro-4-nitrophenyl) phosphorothioate ] 
Chlorothion was exposed to microsomes of rabbit and rat livers and 
of houseflies. The corresponding P=0 analog was observed only in the é 
presence of NADPH, +0,e5ome conversion of the P=0 analog to the corresponding 
phenol was also observed (1700). Rabbit sera also degraded chlorothion to 
the phenolic analog (1078). 
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