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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information


2,2-Dimethylpropane-1,3-diyl dibenzoate is found to be stable at 50 °C and pH 4 and 7. At 50 °C and pH 9 abiotic degradation of 2,2-dimethylpropane-1,3-diyl dibenzoate was observed. Benzoic acid could be identified as the main hydrolysis product (hydrolyzed at 50 °C and pH 9). The calculated mean value of half-life time and hydrolysis rate at 25 °C and pH 9 using the Arrhenius equation are 394.57 hours (16.4 days) and 4.8958E-07 1/s, respectively.


2,2-Dimethylpropane-1,3-diyl dibenzoate is biodegradable when using unadapted inoculum from a wastewater treatment plant treating predominantly domestic sewage as shown in a Manometric Respirometry Test (OECD TG 301d, 60.2 % after 28 days). The pass level of biodegradation of 60% removal of ThOD was reached, but the 10 day window was failed. 2,2-dimethylpropane-1,3-diyl dibenzoate showed a degradation of 72 % after 40 days. Overall, 2,2-dimethylpropane-1,3-diyl dibenzoate is considered to be "Readily biodegradable, but failing the 10 day window".


2,2-Dimethylpropane-1,3-diyl dibenzoate was not tested for bioaccumulation. A log Kow of 4.7 indicates a bioaccumulation potential. However, a QSAR using the Estimation Program Interface (EPI) Suite v4.11 of the U. S. Environmental Protection Agency yields a BCF of 566.3 L/kg which is far below the trigger value for the PBT assessment. Therefore, the experimental study was waived.


The QSAR determination of the carbon partition coefficient for 2,2-dimethylpropan-1,3-diyl dibenzoate using the model KOCWIN included in the Estimation Program Interface (EPI) Suite v4.11 revealed KOC values of 2475 L/kg (log Kow method) and 5354 L/kg (MCI method) for the unaffected molecule of 2,2-dimethylpropan-1,3-diyl dibenzoate.