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EC number: 202-969-7 | CAS number: 101-72-4
Hydrolysis
Administrative data
Link to relevant study record(s)
Description of key information
In a weight-of-evidence approach it was found that IPPD hydrolyses quickly under environmental conditions (pH7, 20°C with a half-life of 3.9 hourfs. The main hydrolysis product was identified as 4-hydroxydiphenylamine (CAS Nr. 122-37-2) which also was found in the oxidised form Benzo-quinoneimine-N-phenyl.
Key value for chemical safety assessment
- Half-life for hydrolysis:
- 3.9 h
- at the temperature of:
- 25 °C
Additional information
Hydrolysis as a function of pH of IPPD was performed according to EU method C.7 'Degradation - Abiotic Degradation Hydrolysis as a Function of pH' (1992). The half-life time of hydolysis at pH 4.1 and 50 °C was estimated about 22 hours (35°C: 75 hours). For pH 7 and 9 at 50 °C the half-life times of hydrolysis were estimated 1.3 and 1.2 hours (DUSLO a.s., 2008)
The weight-of evidence appraoch was completed with a study (Monsanto 1986). This study yielded a half-life under environmental realistic conditions and the hydrolysis products were identified.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.
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