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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Link to relevant study record(s)

Description of key information

Hydrolysis will not significantly contribute to the removal of DIDP from the environment. The DIDP hydrolysis half-life (25 degrees C) is calculated as:
pH 7 = 3.4 years
pH 8 = 125.2 days

Key value for chemical safety assessment

Additional information

Results from the EQC (Equilibrium Criterion) Levels I and III distribution models (Mackay, 2001) show that because of its low water solubility, DIDP is not expected to partition to the water compartment (see Section 4.2.3). However, abiotic degradation of any trace amounts of DIDP which may be present in aquatic environments is unlikely to occur at a significant rate based on modeled data. The HYDROWIN model, a subroutine within the USEPA (2000) computer program, estimates a hydrolysis half-life for DIDP of 3.4 years at pH 7 (25°C) and 125.2 days at pH 8 (25°C).