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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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 based on the half-life of the third hydrolysis reaction of the TEPA based imidazoline. 
The TEPA based imidazoline consists of a large fraction of di-imidazoline.
The first half life of 16.3 h at 20°C is linked to the hydrolysis of the first imidazoline ring
The second half-life of 158 h at 20°C is linked to the hydrolysis of the first amide bond detaching one alkyl chain
The third half-life of 28 d at 20°C is linked to the hydrolysis of the second imidazoline ring of the TEPA based di-imidazoline.

Key value for chemical safety assessment

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

Additional information

The imidazoline ring(s) of Amidoamines/Imidazolines probably 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 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.

The amidoamines formed are under alkaline conditions hydrolysed further to ethyleneamines.