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EC number: 250-954-9
CAS number: 32210-23-4
Average of vapor pressure (mean of three determinations
(three flow rates)):
1.95 Pa at 10°C
4.99 Pa at 20°C
12.3 Pa at 30°C
The vapor pressure curve is provided in the experimental
The regression parameters were calculated:
ln VP (mean in Pa) = -7904.46 / T (in K) + 28.58 (r2=
The linearity of the detector response with respect
to concentration was assessed over the concentration range of 9.70 to
485 mg/L (n=5). This was satisfactory with a correlation coefficient of
1.000 being obtained. Concentrations of
sample solutions from traps 1 range between 18 and 208 mg/L, therefore
within the calibration range. For traps 2 (0.17 – 0.53 mg/L), inaccuracy
is considered negligible as this collected fraction represents less than
2% of the total amount.
ensure saturation control, three different flow rates were used at each
temperature. From the data, it can be clearly seen that higher flow
rates did not lead to lower vapor pressures, which means that the
nitrogen was saturated with test item under the conditions of the test.
The vapour pressure of the test substance was measured under GLP
according to OECD 104 / EU A4 guideline, gas saturation method.
Determinations were conducted at 10, 20 and 30°C, with three flow rates
per temperature. Mass of evaporated test item was quantified by GC.
Vapour pressure at 25°C was interpolated from the regression.
The vapour pressure of the test material has been determined to be 7.9
Pa at 25°C.
The vapour pressure of the analogue test substance was measured under
GLP according to OECD 104 / EU A4 guideline, gas saturation method.
A similar, or slightly lower, VP is anticipated for the target substance.
Low volatility (from analogue).
VP = 7.9 Pa at 25°C for the cis-isomer; expected similar, or slightly
lower for the trans isomer and the target reaction mass.
No data is available on the substance itself. However, a reliable
experimental study, conducted according to a recognized OECD/EC method
and under GLP, is available on an analogue (single isomer). Comparing
boiling points, minor difference is anticipated with the present dossier
multiconstituent substance, the read-across is considered justified for
a key study, and the result is retained as key data for purpose of CSA.
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