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EC number: 268-074-9
CAS number: 68002-61-9
For figures, kindly refer to the attached
background material section of the IUCLID.
vapour pressure of the test substance, C16-18 and C18-unsatd. TMAC
(purity not specified) was determined isothermal thermogravimetric
effusion method according to OECD Guideline 104, EU Method A.4 and US
EPA OPPTS 830.7950. An amount of 7.58 or 8.13 mg of the test substance
was applied to the surface of a roughened glass plate as a homogeneous
layer. The weight loss of the test substance was measured continuously
as a function of time. Using the weight losses obtained at 170°C, 180°C,
190°C and 200°C, the plot of the log PT of the test substance as
function of the reciprocal temperatures was not linear (r < 0.99). This
was most probably due to reaction and/or decomposition which was also
indicated by the slightly bended weight loss curve at 200°C. The weight
loss at 160°C was too low to be accurate and was therefore not used for
determination of the vapour pressure. The weight loss of the test
substance at 170°C, 180°C, 190°C and 200°C however, was lower than the
weight loss of reference substance chrysene at the same temperatures.
Accordingly, the vapour pressure of the test substance was determined to
be lower than that of chrysene. Under the study conditions, the vapour
pressure of the test substance was determined to be <0.00000084 Pa
(i.e., equivalent to <6.3 x 10E-9 mm Hg) at 20°C and <0.0000029 Pa
(i.e., equivalent to <2.2 x 10E-8 mm Hg) at 25°C (Brekelmans, 2012).
The vapour pressure of the test substance was determined using isothermal thermogravimetric effusion method according to OECD Guideline 104, EU Method A.4 and US EPA OPPTS 830.7950 (Brekelmans, 2012).
and <8.4E-7 Pa at 20°C
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