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T1 Methyl Parathion Health and Safety Guide - Health and Safety Guide 75
A1 United Nations Environment Programme, 
A1 World Health Organization, 
A1 International Labour Organisation, 
K1 health
K1 health hazard
K1 waste disposal
K1 chemical
SN 92 4 151075 7
YR 1992
FD 1992
LK https://wedocs.unep.org/handle/20.500.11822/29617
UL https://wedocs.unep.org/handle/20.500.11822/29617
NO Pure methyl parathion is crystalline and white. It is relatively insoluble in water, poorly soluble in petroleum ether and mineral oils, and readily soluble in most organic solvents. Methyl parathion is stable at pH 1-7, but undergoes rapid decomposition in alkaline media at pH 8-9. On heating, methyl parathion readily isomerizes to the 0,S-dimethyl analogue.
DS UN Environment Document Repository
RD Sep 16, 2026