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EC number: 942-925-0
CAS number: -
The QSAR determination of the vapour pressure of the zinc free substance '5,5'-(E)-diazene-1,2-diylbis(4,6-dihydroxypyrimidin-2(5H)-one)' using the model MPBPWIN included in the Estimation Program Interface (EPI) Suite v4.11 revealed a value of 2.83E-14 Pa at 25°C. The predicted value can be considered reliable yielding a useful result for further assessment.
The lowest value which can be
added in IUCLID is 10E-09 which is higher than the real vapour pressure
of the substance. It is, thus, important to have in mind that the real
vapour pressure is clearly lower than the one reported as key value.
The vapour pressure was estimated
using the formula of the zinc-free “Zinc-Azo barbituric acid/Melamine".
The calculation of the vapour pressure of the original substance
containing Zinc is not feasible as the EPIWIN model is not validated for
organometal complexes. It is however expected that the vapour pressure
of the zinc containing substance is in the same order of magnitude as
the corresponding zinc-free compound.
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