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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2009
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: guidance followed, no GLP

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2009
Report date:
2009

Materials and methods

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

Test material

Constituent 1
Chemical structure
Reference substance name:
Pyrene
EC Number:
204-927-3
EC Name:
Pyrene
Cas Number:
129-00-0
Molecular formula:
C16H10
IUPAC Name:
pyrene

Results and discussion

Vapour pressureopen allclose all
Temp.:
ca. 183 °C
Vapour pressure:
ca. 1.07 kPa
Remarks on result:
other: measured value
Temp.:
ca. 20 °C
Vapour pressure:
ca. 0.2 Pa
Remarks on result:
other: extraqpolated value, out of scope
Transition / decomposition
Transition / decomposition:
yes
Transition temp.:
ca. 145.3 °C

Any other information on results incl. tables

Linear equation: log p = -2964.5*(1/T)+9.4551

Scope: from 183 to 393 °C

Nature of the change during measuring: none

Nature of the change for estimate: transition liquid-solid

Temperature of transition: 145.3 °C

Applicant's summary and conclusion

Conclusions:
The real value for 20°C should be 1000x lower than extrapolated value; extrapolated value is out of scope, moreover there is a liquid-solid transition