Registration Dossier
Registration Dossier
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EC number: 500-012-0 | CAS number: 9004-77-7
Vapour pressure
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.
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