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EC number: 231-640-0 | CAS number: 7665-72-7
In the course of a OECD 111 study butyl glycidyl ether has been assessed to be readily and moderately hydrolysable at pH 4 and 7 (with half-times of 0.3 hours and 20.3 days, respectively). At pH 9 and 50 °C no remarkable hydrolysis rate has been determined, as the hydrolysis rate was less than 10 % under these conditions.
In the course of a OECD 111 study glycidyl methacrylate has been assessed to be readily hydrolysable (with T1/2 = 2.83, 3.66 and 2.22 day at pH 4,7,and 9, respectively).
There is no study available elucidating the hydrolytic stability of the target substance tert-butyl glycidyl ether. Therefore, for the determination of the hydrolysis rate the substances 2,3-epoxypropyl methacrylate (EC No. 203-441-9) and n-butyl glycidyl ether (EC No. 219-376-4) are considered as appropriate read-across partners.
This read-across is based on the hypothesis that source and target substances have similar physico-chemical properties, triggered mainly due to similar physico-chemical properties (MW, water solubility, partitioning behaviour (log Kow value) and the presence of the same reactive functional group (2,3-epoxypropyl ether group).
Since n-BGE and tBGE are substances with the same molecular weight (which differentiate only in the structure of the butyl-group), the determined hydrolysis rate for nBGE will therefore be used as a comparative value for the determination of the same value for tBGE.
Consequently, the half-life of tBGE is estimated to 20.3 d (at pH 7 and 20°C).
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