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EC number: 278-270-6
CAS number: 75627-12-2
Experimental details are included in the study report (attached in
The log PT versus 1/T curve for the substance over the range 160-190°C
showed poor linearity (correlation coefficient r < 0.99). Extrapolation
of the curve to 20°C or 25°C would not give reliable results for the
vapour pressure of the substance at these temperatures. Since the weight
loss of the test item at 160-190°C was lower than the weight loss of
reference substance chrysene at the same temperatures, it was considered
that vapour pressure of the substance at 20°C (25°C) is lower than the
vapour pressure of chrysene at 20°C (25°C).
The vapour pressure of the substance was determined
using the isothermal thermogravimetric effusion method in a GLP study
according to EC A.4, OECD 104 and OPPTS 830.7950.
The constants specific for the experimental arrangement were
determined using a set of 5 reference compounds. The log PT
versus 1/T curve for the substance over the range 160-190°C showed poor
linearity (correlation coefficient r < 0.99). Extrapolation of the curve
to 20°C or 25°C would not give reliable results for the vapour pressure
of the substance at these temperatures.
From the measured weight losses in the temperature range 160
-190°C, the vapour pressure of the substance was determined to be lower
than the vapour pressure of reference substance chrysene. The vapour
pressure of the substance at 20°C and 25°C was concluded to be < 8.4E-7
Pa and < 2.2E-6 Pa, resp.
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