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EC number: 248-948-6
CAS number: 28299-41-4
From the measured data the parametersof the Antoine equation can be
derived by regression.
Measured vapour pressures and corresponding temperatures:
The purpose of this study was the determination of the vapour pressure
of the test item according to European Commission Regulations (EC) No.
440/2008 and No. 761/2009, A.4. Vapour pressure: effusion method and
OECD test guideline, OECD 104 (2006) Vapour pressure.
The method is based on the estimation of the mass of test item flowing
out per unit of time of a Knudsen cell in the form of vapour, through a
micro-orifice under ultra-vacuum conditions. The test item is filled
into the test cell and placed in a furnace in the vacuum chamber from
which the sample evaporates. The temperature of the cell with the test
item is controlled by a surrounding heater. The vapour forms a molecular
jet of defined geometry limited by an orifice. The mass of effused
vapour is obtained by determining the loss of mass in the cell.
The vapour pressure of Ditolyl ether at 20 and 25 °C was determined as
0.17 Pa and 0.32 Pa, respectively.
The vapour pressure of Ditolyl ether at 20 °C and 25 °C was determined
as 0.17 Pa and 0.32 Pa, respectively.
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