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EC number: 237-438-9
CAS number: 13784-51-5
The pressure transducer was calibrated
at June 4, 2010 over a pressure range of
0.02 to 13 kPa. The measured deviation
was maximum 0.0013 kPa.
The temperature deviation as function
of pressure was determined over a pressure range of 0.02 – 100 kPa with
12.74 mg Indium in a70 µl Aluminium cup with pierced lid. The heating
rate was 5°C/min. The measured boiling temperatures of the test
substance at the different pressures were corrected for this deviation.
Six measurements at different
pressures were carried out with the test substance. Because the test
substance is a mixture of different components, more than one boiling
peak is observed. The initial boiling peak is used for the evaluation.
The intakes, the measured
(initial)boiling temperatures and their corresponding observed pressures
are listed in the table below.
The vapour pressure plot of the
individual measurements is shown in figure 1 in the attachment together
with the Antoine fit (regression line) of the measured data.
The Antoine equation constants A, B
and C are calculated from this fit. This results in the following
p(kPa) =3.8797 – [408.68 /(T(K)-225.95)]
The estimated vapour pressure of the
test substance calculated from this equation is 6.28∙10-3kPa
The vapour pressure of
2,4-Pentanedione, peroxide, 30% in solvent mixturewas determined
according to ASTM E1782-08 . This method is not included intoEC
Regulation No 761/2009, Guideline A.4 , but it is expected that this
will occur in the near future. In 2010 a request for inclusion was sent
to the Dutch National Coordinator for EC Test Methods.
The estimated vapour pressure of
2,4-Pentanedione, peroxide is 6.28 Pa at 20°C.
The estimated vapour pressure of 2,4-Pentanedione, peroxide is 6.28 Pa at 20°C.
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