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EC number: 692-614-6
CAS number: 5660-53-7
Key experimental value of vapour pressure at 20°C: 30 Pa +/- 2 PaSupporting experimental value of vapour pressure at 20°C: 88.4 +/- 3.3 Pa
The vapour pressure was determined in two studies using the same method:
the static method.
These determinations have been performed according recognized
international guidelines and under GLP. No deviations from the
guidelines was observed in these studies.
In the supporting study, the sample has not been outgassed in the
apparatus at low temperature before the measurement of the vapour
pressure. The outgassing have been performed in the key study. This
difference can explained the gap between the key value and the
supporting value. Indeed, some volatile impurities have probably
affected the value of vapour pressure determined in the supporting
As recommended in the ECHA Guidance document R 7.A, the vapour pressure
obtained with the lowest influence of volatile impurities of the test
substance was chosen as the key value.
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