Registration Dossier

Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2008
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: guidance followed, no GLP

Data source

Referenceopen allclose all

Reference Type:
study report
Title:
Unnamed
Year:
2008
Report Date:
2008
Reference Type:
study report
Title:
Unnamed
Year:
2008
Report Date:
2008

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
GLP compliance:
no
Type of method:
static method

Test material

Reference
Name:
Unnamed
Type:
Constituent

Results and discussion

Vapour pressureopen allclose all
Temp.:
ca. 79 °C
Vapour pressure:
ca. 1.16 kPa
Remarks on result:
other: measured value (first sample)
Temp.:
ca. 85 °C
Vapour pressure:
ca. 1.6 kPa
Remarks on result:
other: measured value (second sample)
Temp.:
ca. 20 °C
Vapour pressure:
ca. 61.5 Pa
Remarks on result:
other: estimated value
Temp.:
ca. 20 °C
Vapour pressure:
ca. 63.5 Pa
Remarks on result:
other: estimated value
Transition / decomposition
Transition / decomposition:
yes
Transition temp.:
ca. 30 °C

Any other information on results incl. tables

first sample (nehyzb):

Linear equation: log p = -2229.7*(1/T)+9.3948

Scope: from 72 to 235 °C

Accuracy: <10%

Nature of the change during measuring: none

Nature of the change for estimate: transition liquid-solid

Temperature of transition: <70°C

second sample (hyzb):

Linear equation: log p = -2292.6*(1/T)+9.6232

Scope: from 80 to 223 °C

Accuracy: <10%

Nature of the change during measuring: none

Nature of the change for estimate: transition liquid-solid

Temperature of transition: <50°C

Applicant's summary and conclusion

Conclusions:
The estimate values for 20°C do not take into account that there is a liquid-solid transition at cca 30°C. Real vapour pressure values for 20°C should be ten times lower. However these estimated values could be taken as worst case.