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Vapour pressure

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Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Principles of method if other than guideline:
static method with an improved apparatus design described in detail
Type of method:
other: static method with an improved apparatus design described in detail
Key result
Temp.:
25 °C
Vapour pressure:
0.003 Torr
Remarks on result:
other: extrapolated to 25 oC as worst case
Remarks:
0.003 torr = 0.4 Pa
Remarks on result:
other: log P = 31.85686 - (4711.1/T) - (7.48624*logT)
Remarks:
measured from mp to bp

log P = 31.85686 - (4711.1/T) - (7.48624*logT); measured from mp to bp

Conclusions:
vp curve developed based on data measured from mp to bp; log P = 31.85686 - 4711.1/T) - (7.48624*logT); extrapolation to 25 oC give 0.003 torr (0.4 Pa). This is close to ACD calculated 0.2 Pa, therefore 0.4 Pa shall be used as worst case vp @ 25 oC
Executive summary:

vp curve developed based on data measured from mp to bp; log P = 31.85686 - 4711.1/T) - (7.48624*logT); extrapolation to 25 oC give 0.003 torr (0.4 Pa).  This is close to ACD calculated 0.2 Pa, therefore 0.4 Pa shall be used as worst case vp @ 25 oC

Endpoint:
vapour pressure
Type of information:
calculation (if not (Q)SAR)
Remarks:
calculated vp is close to worst case experimental value
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
results derived from a valid (Q)SAR model and falling into its applicability domain, with adequate and reliable documentation / justification
Principles of method if other than guideline:
calculation
Type of method:
other: calculation
Temp.:
25 °C
Vapour pressure:
0.2 Pa
Conclusions:
calculated vp (0.2 Pa @ 25 oC) is close to worst case experimental value (0.4 Pa @ 25 oC)
Executive summary:

calculated vp (0.2 Pa @ 25 oC) is close to worst case experimental value (0.4 Pa @ 25 oC)

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
weight of evidence
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
documentation insufficient for assessment
Remarks:
limited or no method information, reported values are close to worst case study results
Principles of method if other than guideline:
publication has limited or no method information
Type of method:
other: publication has limited or no method information
Temp.:
141.5 °C
Vapour pressure:
10 Torr
Temp.:
282.5 °C
Vapour pressure:
760 Torr
Conclusions:
10-760 torr @ 141.5-282.5 oC, reported values are close to worst case study results
Executive summary:

10-760 torr @ 141.5-282.5 oC, reported values are close to worst case study results

Description of key information

vp curve developed based on data measured from mp to bp; log P = 31.85686 - 4711.1/T) - (7.48624*logT); extrapolation to 25 oC give 0.003 torr (0.4 Pa).  This is close to ACD calculated 0.2 Pa, and 0.4 Pa shall be used as worst case vp @ 25 oC

Key value for chemical safety assessment

Vapour pressure:
0.4 Pa
at the temperature of:
25 °C

Additional information