RT Report
T1 Diazinon: Environmental Health Criteria 198
A1 United Nations Environment Programme, 
A1 World Health Organization, 
A1 International Labour Organisation, 
K1 environmental health
K1 chemical
K1 toxic substance
K1 carcinogen
SN 92 4 157198 5
YR 1998
FD 1998
LK https://wedocs.unep.org/handle/20.500.11822/29475
UL https://wedocs.unep.org/handle/20.500.11822/29475
NO The chemical name for diazinon is  O, O-diethyl O-2-isopropyl-6-methylpyrimidinyl-4-yl phosphorothioate. The pure material forms a colourless liquid with a faint ester-like odour. The technical active ingredient is a yellow/brown liquid with a slight compound-specific odour. The boiling point is 83-84°C at 26.6 mPa and the vapour pressure (volatility) is low (9.7 mPa at 20°C). The solubility in water at room temperature is 60 mg/litre. Diazinon is soluble in most organic solvents and has an octanol/water partition coefficient (log Pow) of 3.40. It is stable in neutral media, but is slowly hydrolysed in alkaline media and more rapidly in acid media. It decomposes at temperatures above 120°C.
DS UN Environment Document Repository
RD Sep 21, 2026