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EC number: 283-392-8
CAS number: 84605-29-8
tables below shows < 10% change in the concentration of the test
substance and in the GC peak area percents of individual component after
a 24 hour storage in n-octanol at 22 deg. C
Table 1. Stability
of Test Substance in n-Octanol (24 hours at 22 C)
Sum GC Peak Areas
% difference in concentration after 24 hours
Table 2. GC
Peak Area % of Components in Substance After Storage in n-Octanol (24
hours at 22 C)
Peak Retention time (min)
GC chromatorams are attached as Figure 1
The stability of the test substance in
n-octanol is determined by comparing a freshly prepared solution of the
substance to a solution of the substance in n-octanol stored for a
period of 24 hours at 22 deg. C. The storage conditions reproduce the
conditions under which the substance was in contact with the solvent
during OECD 107 partition coefficient testing.
The compositions of the substance at t = 0
and t = 24 hours were compared by GC -MS following derivatization to
halogenated derivatives with pentafluorobenzyl bromide (CASRN
1765-40-8). The derivatization process produces
pentafluorobenzyl-phosphorodithioic acid molecules more amenable to GC
separation than the starting zinc dialkyldithiophosphate complex.
Chromatograms were compared both
qualitatively (by retention times of eluted peaks) and quantitatively on
the basis of peak areas (which are proportional to the amount of a
component) to determine any significant losses due to contact with
Results of the analysis indicate the
substance is stable in n-octanol for the duration of the OECD 107
partition coefficient study by the shake flask method. The criterion for
stability was < 10% change in the GC peak areas of individual components
or in the concentration of the test substance.
The stability of the substance was not
evaluated in other solvents as it is not stored in other organic
solvents prior to testing for other physico-chemical properties.
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