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EC number: 405-820-6
CAS number: 30025-38-8
The half-life of hydrolysis of DPGEE could not be determined. Measured degradation/loss over 5 days was 4.93% at pH 4 and 5.35% at pH7 and 0% at pH 9. Hydrolysis rate constants cannot be estimated for compounds of this type which are generally regarded as hydrolytically stable at pH ranges normally encountered in the environment.
In a valid guideline OECD 301F and GLP manometric respiration study, DPGEE was found to be readily biodegradable, with a BOD28 of 81%. Degradation of 74% was seen within the 10 day window.The substance was also assessed in a guideline inherent biodegradation study. A biodegradation rate greater than 70% (98%) in this test confirmed inherent ultimate biodegradability.
The adsorption coefficient (Koc) of ethoxypropoxy propanol is <17.8 (log10 Koc<1.25) at 40 Celsius as determined by an HPLC method. The QSAR (KOCWIN version 2.0; EPISUITE) values are supportive in that they yield a non-corrected log Koc value of 0.1507 and corrected value of -0.8534 derived from an estimated log Kow value of -1.40. These are of similar order to the experimental result. It can be concluded that DPGEE will have a low potential for adsorption to soil or sediment.
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