Parathion rearrangement

ENDRIN (72-20-8) Reacts, possibly violently, with strong acids (forms explosive vapors), strong oxidizers. Incompatible with parathion. Rearranges to endrin ketone (8-ketoendrin) in the presence of some metal salts, catalysts, strong acids, in sunlight, and in elevated temperatures above 392°F/200°C. Slightly corrosive to metals. 

The rate and mechanisms of degradation of parathion depend on the nature of the clay, its hydration status, and the saturating cation [119—121]. In particular cases (e.g., parathion) the rearrangement or degradation products are more toxic to mammals than the parent compound itself. 

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