Registration Dossier
Registration Dossier
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 629-735-0 | CAS number: 1226892-50-7
Hydrolysis
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.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
