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EC number: 206-354-4
CAS number: 330-54-1
Almost no degradation of Diuron at the tested pH was observed to occur
Table 1: Time course of Diuron tech. concentrations at 50 ºC and different pH values
[%] of initial
Table 2: Degradation rate and half-life of Diuron tech. at 25 ºC / 50 ºC and different pH values *
< 0.693 y-1
> 1 year
* Degradation rate calculated according to Arrhenius equation
A GLP guideline study (OECD 111) is available for this test substance.
The hydrolytic stability of Diuron under abiotic conditions is not
dependent on pH. The degradation of Diuron being less 10 % at Ph 4, 7
and 9 and the corresponding half life at ambient temperature (calculated
using Arrhenuis equation) estimated to be longer than 1 yr.
Diuron is not susceptible to abiotic hydrolysis, is hydrolytically stable at pH 5, 7 and 9 for 120 hours at 50 °C, in the dark. Therefore, chemical hydrolysis can be excluded as a dissipation mechanism of Diuron in environmental systems.
A GLP guideline study (OECD
111) is available for this test substance. The hydrolytic stability of
Diuron under abiotic conditions is not dependent on pH. The degradation
of Diuron being less than 10 % at pH 4, 7 and 9 and the corresponding
half life, at ambient temperature (calculated using Arrhenuis equation),
estimated to be longer than 1 yr (Wilfinger, 2007)
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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