Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

A test on the hydrolysis potential of DBP indicated that at pH 4.0 and 7.0 DBP was found to be stable, i.e. less than 10% hydrolysis after 5 days. The study was performed according to EU method C.7 at pH values of 4, 7 and 9 and a temperature of 50°C and, additionally at 39°C for pH = 9 (BASF, 1989). The lowest half-life values occur at a pH of 9 resulting in a DT50 of 2.7 days at 50°C and 8.2 days at 39°C.

According to EU RAR, 2004 the photooxidation by OH radicals contributes to the elimination of DBP from the atmosphere. The

experimental degradation rate constant amounts to about 18.10-12 cm3/mol.sec corresponding to a half-life of 21.4 hours at an average OH concentration of 500,000 molecules/cm3.