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EC number: 407-560-9
CAS number: 107934-68-9
During initial pumpdown the observed vapour
pressure of the sample at ambient temperature fell from around 2x10-2
Pascals using the rotary pump only to below the observable
threshold (<5x10-4 Pascals) when the diffusion pump was
used. On warming to 91 °C a vapour pressure of 7.8x10-4
Pascals was observed representing a rate of pumping of sample of around
0.1 μg per hour. The sample was then further pumped overnight at
100 -105 °C before Run 1 was performed and over this period the vapour
pressure fell to below the detection limit. After Run 1 the sample was
found to have remained intact after the measurements and consequently
the vapour pressure determination is considered appropriate to the bulk
of the substance. The vapour pressure at 25 °C obtained via
extrapolation of the indicated vapour pressure reationship was 3.458x10-7
Log Vp (Pa) = (-3719.373 / Temp (K)) +
vapour pressure of test item was determined according to the EC A.4
method in compliance with GLP.
test material has been determined to have a vapour pressure of 3.458 x
10-7 Pa at 25°C using the vapour pressure balance effusion method.
3.458E-07 Pa at 25 °C
The vapour pressure of the substance was
determined at 25 °C according to EEC Method A.4 (1984). The effusion
method (vapour pressure balance) was applied.
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