Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information


In the atmosphere rapid degradation takes place by indirect photolysis with OH radicals considering a OH concentration of 500,000 radicals/cm³ as a 24h-average. The half-life is calculated to be 1.8 hours. (Currenta, 2009).

Stability in Water:

The stability of N-isopropyl-N'-phenyl-p-phenylenediamine (IPPD) in aqueous test solution was determined in a hydrolysis test according to OCED Guideline 111 (Hydrolysis as a function of pH). Another test reported the key value for the half-life at environmental relevant conditions (pH7, 25°C) of 3.9 hours. The main hydrolysis product was identified as 4-hydroxydiphenylamine (CAS Nr. 122-37-2) which also was found in the oxidised form p-benzoquinoneimine-N-phenyl (Monsanto, 1986). From these findings IPPD is regarded as rapidly degradable in aqueous media.