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EC number: 257-077-0
CAS number: 51240-95-0
The average retention times of the reference
substances as well as the test substance, corrected for the dead time,
are presented in the table below. The theoretical log Kowvalues
of the reference substances were taken from OECD guideline 117.
Average netretention time(min)
In the attachment the graph of the
theoretical values of log Kowand the average log k of the
reference substances and an example of a HPLC-chromatogram from the
analysis performed according to the test set up.
The average measured log Kowvalue
for 1,1,3,3-tetramethylbutyl peroxyneodecanoate was calculated with the
retention time from two injections usingthe
calibration plot of log Kowversus log k of the selected
reference substances. The result for log Kowwas
determined to be > 6.5, as estimation the log Kowvalue was
calculated by extrapolation to be 6.9. In Annex 2 detailed results and
calculations are displayed.
The partition coefficient n-octanol/water (Kow)
of 1,1,3,3-tetramethylbutyl peroxyneodecanoatewas estimated using
the High Performance Liquid Chromatography (HPLC) method. The Kowtest
was performed in accordance with the OECD guideline 117 with one
modification, the reference substances and test substances were
dissolved in methanol. The data on the partition coefficient can be used
to predict the adsorption on soil and sediments and for establishing
quantitative structure-activity relationships for a wide range of
Determinations of retention times were
performed in duplicate. Since during analysis,1,1,3,3-Tetramethyl- butyl
peroxyneodecanoates is separated from Isododecane the outcome of the
testdata is referring to the pure substance.
The values of log Kowderived
from the different measurements fell within a range of ± 0.1 log
units.The correlation coefficient R2for the relationship
between log k and log Kowof the reference substances was
calculated to be higher than 0.9.
The partition coefficient log Pow
value for 1,1,3,3-tetramethylbutyl peroxyneodecanoate is >6.5. The
calculated log Kow value by extrapolation is 6.9.
The partition coefficient log Pow value for 1,1,3,3-tetramethylbutyl peroxyneodecanoate is 6.9.
The calculated log Kow value by
extrapolation is 6.9. The partition coefficient log Pow value for
1,1,3,3-tetramethylbutyl peroxyneodecanoate is >6.5.
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