Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 202-969-7 | CAS number: 101-72-4
Endpoint summary
Administrative data
Description of key information
Additional information
N-isopropyl-N'-phenyl-p-phenylenediamine has an adsorption coefficient in the range of LogKoc = 2.39 to 3.64 (Allmendinger 2015a), however is the substance hydrolytically unstable (half-life 3.9 h). 4-Hydroxydiphenylamine (CAS 122-37-2) is the main hydrolysis product. The estimated LogKoc values for 4-hydroxydiphenylamine, using different accepted calculation methods are in the range of 2.41 to 3.03 (Allmendinger 2015b).
The calculated logKoc value from IPPD, is used for the calculation of PNEC concentration for sediment and soil. The lowest Log Koc of the parent substance was chosen as it represent the worst case (gives the highest PNEC in soil and sediment, calculated by EPM)
The calculated Henry's law constant of 0.000146 Pa m³/mol at 25 °C indicates that the compound has only a limited potential for volatilization from surface waters.
The distribution of N-isopropyl-N'-phenyl-p-phenylenediamine in the environment was calculated according to the Mackay fugacity model level I (Allmendinger 2015 d) based on the physico-chemical properties. The main target compartment for N-isopropyl-N'-phenyl-p-phenylenediamine is water with about 88%, followed by soil and sediment with each about 4 %.
A MacKay level III fugacity model (Robertson 2000, presented in the SIDS report) yielded a more detailed description of the substance in the different compartments: The results show that IPPD released via the water phase leads to negligible exposure of the sediment (0.1%) and to no exposure to soil. Released directly to soil will not result in any significant percentages in sediment. It should be mentioned here that direct release to water and soil are the main routes for environmental exposure, concerning manufacture and DU uses as well as the release from tyres.
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.
