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T1 Trichlorfon Health and Safety Guide - Health and Safety Guide 66
A1 United Nations Environment Programme, 
A1 World Health Organization, 
A1 International Labour Organisation, 
K1 health
K1 chemical
K1 chemical safety
K1 waste disposal
SN 92 4 151066 8
YR 1991
FD 1991
LK https://wedocs.unep.org/handle/20.500.11822/29614
UL https://wedocs.unep.org/handle/20.500.11822/29614
NO Trichlorfon is a colourless crystalline powder that is stable at room temperature. It is slowly hydrolysed in acid media; the half-life is 526 days at pH 1-5 and 20°C. In alkaline media, at pH 8 and 37.5 °C, it hydrolyses initially to the more toxic compound dichiorvos, but is essentially 100% hydrolysed in 24 h to less toxic products, such as dirnethyl hydrogen phosphate, dichloroacetaldehyde, and givoxal. Trichlorfon also decoin-poses under ultraviolet irradiation.
DS UN Environment Document Repository
RD Sep 16, 2026