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Physical & Chemical properties

Vapour pressure

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Administrative data

Link to relevant study record(s)

Description of key information

0.0025mmHg @ 25C (equivalent to 0.33Pa)

<1Pa @ 20C

QSAR values (Two models)

Triethylene glycol butyl ether: 0.0089Pa@20C, 0.069Pa @25C

Tetraethylene glycol butyl ether: 0.00225Pa@20C, 0.00050Pa @25C

Key value for chemical safety assessment

Vapour pressure:
0.33 Pa
at the temperature of:
298 K

Additional information

Reasonably consistent values are available from multiple sources, including values at different temperatures. Not all are absolute measurements (some are limit values). The key parameter retained is from a recognised reliable source and is consistent with values for the likely most volatile component. The value of 0.33Pa at 25C is based on the value cited in mmHg from the key study. The QSARs seem to underestimate the vapour pressure but may not reflect possible low levels of more volatile impurities in commercially produced material.