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EC number: 619-437-9
CAS number: 99474-22-3
At the first measurement of experiment 4, all cells were slightly
contaminated. Therefore, the cells were meticulously cleaned and
weighed. This weight was used as initial weight for the subsequent
measurements. To avoid bias, this measurement was not used for
At the second measurement of experiment 5, all cells showed no weight
loss. On the basis of the first and third measurement the second
measurement was defined as outlier. To avoid bias, this measurement
was not used for calculations.
At the first, second and third measurement of experiment 6, cell 1 and
3 were slightly contaminated. Therefore, the cells were meticulously
cleaned and weighed. This weight was used as initial weight for the
subsequent measurements. To avoid bias, this measurement was not used
At the first measurement of experiment 9, all cells were empty.
The measured values for temperature and vapour pressure were
evaluated as follows:
A graph with log P vs. 1/T was plotted. Since the values were
correlated by a linear relation, the data could be fitted by linear
Parameters of Linear Regression
The following vapour pressures were determined experimentally
and considered as valid (mean and standard deviation given):
Experimentally Determined Vapour Pressures
Stand. Dev. P
Stand. Dev. = Standard Deviation; RSD = Relative Standard
For the test item, the following vapour pressures at 20°C and at
25°C were calculated from the regression equation:
Vapour pressure at 20°C:
Vapour pressure at 25°C:
The linear regression of log P vs. 1/T gave a correlation
coefficient r of - 1.0000, showing good repeatability and precision.
Therefore, the determination is considered as valid.
Vapour pressure (positive control) at 30°C:
Criteria for thevapourpressure of the positive control at 30°C
The vapour pressure met the validity criteria. Therefore the
study can be considered as valid.
The vapour pressure of the test item was determined according to
OECD 104 resp. EU A.4 using the effusion method (weight loss; GLP
Vapour pressure was examined ateight
different temperatures. Three temperatures could be evaluated as they
showed reproducible weight loss. For these temperatures, 1/T was
plotted against log (P).
The graph 1/T vs. log (P) shows a straight line with a
correlation coefficient of - 1.0000.
For the test item, the following vapour pressures at 20 °C and
at 25 °C were calculated from the regression equation:
pressure at 20°C: 2.00E-07 Pa
pressure at 25°C: 4.54E-07 Pa
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