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EC number: 629-765-4
CAS number: 1226892-44-9
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 ringThe second half-life of 158 h at 20°C is linked to the hydrolysis of the first amide bond detaching one alkyl chainThe 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.
ring(s) of Amidoamines/Imidazolines probably undergo(es) hydrolysis
under alkaline, neutral and acidic conditions (Akzo Nobel 2010; Watts,
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
formed are under alkaline conditions hydrolysed further to ethyleneamines.
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