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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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


Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

The half-life of 28 d at 20 °C for tall oil diethylenetriamine imidazoline is read-across from the hydrolysis data from similar substance i.e. a TEPA based imidazoline. The read across of this realistic worst-case half-life is considered to be justified also taking the biodegradation data into account.

Key value for chemical safety assessment

Half-life for hydrolysis:
28 d
at the temperature of:
20 °C

Additional information

Imidazoline DETA

The imidazoline ring(s) of tall oil diethylenetriamine imidazoline most likely undergo(es) hydrolysis under alkaline, neutral and acidic conditions (Akzo Nobel 2010; Watts, 1990). A hydrolysis rate of an imidazoline has been measured using a Tetraethylene pentamine based imidazoline. For this imidazoline a number of hydrolysis rates were measured as the imidazolines are in general a mixture of imidazolines and amides (non ring closed imidazolines). The tetraethylene pentamine based imidazoline contains even di-imidazolines. The shortest half-lifes of 16.3 h at 20°C were found under neutral conditions for the hydrolysis of the first imidazoline ring of the di-imidazoline. For the next step in the hydrolysis degradation route i.e. the hydrolysis of the amide by which the alkyl chain is detached a half-life of 158 h at 20°C was derived. This second reaction step is considered to be representative of the hydrolysis of the DETA based imidazoline as this is also a monoimidazoline. The next step in hydrolysis degradation route would be the opening of the second imidazoline and here a half life of 28 days at 20 °C is derived. The order in which these last two hydrolysis reactions take place is not completely clear. When considering the biodegradation half-life of the DETA based imidazoline and the shape of the degradation curve it seems that a hydrolysis step is here a rate determining step. For read-across from the source chemical (TEPA based imidazoline) to the target chemical (DETA based imidazoline) the use of worst-case half-life of 28 days at 20°C is considered to be justified also taking the biodegradation half-life into account.