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Vapour pressure

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Description of key information

At 63.8 and 145.5 °C the vapour pressure was 1.5E-4 and 1.8E-3 Pa, resp., but it descended perpetually down to the detection limit of 1E-4 Pa. It was concluded that vapour pressure at 20 and 50°C is below 1E-4 Pa. The test item stayed liquid, so the low volatility was not attributable to a polymerized material.

Vapour pressure at 40°C has been estimated as 2.05 E-9 Pa using the QSAR MPBPWIN v1.43 for the most volatile of the 3 smallest components of the UVCB (component 2, DGEBA diacrylate, 2OH). This QSAR estimate is fully reliable since another estimate at 145.5°C (1.74E-3 Pa) matched perfectly the experimental value.

Key value for chemical safety assessment

Vapour pressure:
0 Pa
at the temperature of:
40 °C

Additional information

This conservative value is taken to calculate saturated vapour concentration (Csat). As it is the detection limit, it is potentially a large overestimate, as suggested by QSAR estimates.