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EC number: 605-076-4
CAS number: 156928-09-5
No peaks at the approximate retention time of the test material were
detected on the analysis of any matrix blank. An additional peak at
approximately 9.5 minutes in the pH 4 analysis matrix was attributed to
the phthalate content of the buffer solution and was observed in the
relevant matrix blanks also. There was a minor drop in the pH 4 sample
concentration of approximately 10% during the first 24 hours of testing;
but critically no significant further decrease in concentration occurred
during the following 216 hours at 50.0 ± 0.5 °C. Therefore, as a
reduction of only 0.67% was determined between the 24 hour and the 240
hour time points, the test material was concluded to be hydrolytically
stable. This was since less than 10% hydrolysis was observed over a time
period exceeding 5 days at 50 °C, equivalent to a half-life greater than
1 year at 25 °C.
One study (O'Connor, 2008) was performed according to OECD guideline 111
and regarded as key study (Klimisch score of 1). A half-life time of >
1 year at 25°C and pH 4.0, 7.0 and 9.0 was determined for T002675.
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