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Environmental fate & pathways

Hydrolysis

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Description of key information

Conclusion: Hydrolysis will not significantly contribute to the removal of DINP from the environment.

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Additional information

Results from the EQC (Equilibrium Criterion) Levels I and III distribution models (Mackay, 2001) show that because of its low water solubility, DINP is not expected to partition to the water compartment (see Section 4.2.2). However, abiotic degradation of any trace amounts of DINP 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 (2008) computer program, estimates a hydrolysis half-life for DINP of 3.4 years at pH 7 (25°C) and 125.2 days at pH 8 (25°C).