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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Physical & Chemical properties

Vapour pressure

Currently viewing:

Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP compliant, guideline study, available as unpublished report, no restrictions, fully adequate for assessment
Cross-reference
Reason / purpose for cross-reference:
reference to same study

Data source

Referenceopen allclose all

Reference Type:
study report
Title:
Unnamed
Year:
1995
Report date:
1995
Reference Type:
study report
Title:
Unnamed
Year:
1995
Report date:
1995
Reference Type:
other: amendment
Title:
Unnamed
Year:
1996
Report date:
1996

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
GLP compliance:
yes
Type of method:
dynamic method
Remarks:
under argon

Test material

Constituent 1
Chemical structure
Reference substance name:
1,4-Dimethyl-1H-pyrazole
EC Number:
600-813-6
Cas Number:
1072-68-0
Molecular formula:
C5H8N2
IUPAC Name:
1,4-Dimethyl-1H-pyrazole
Details on test material:
- Name of test material (as cited in study report):1,4-Dimethylpyrazol
- Storage condition of test material: room temperature, avoid moist and acid.
- Purity: 99.7%

Results and discussion

Vapour pressureopen allclose all
Temp.:
20 °C
Vapour pressure:
3.47 hPa
Temp.:
50 °C
Vapour pressure:
21.3 hPa

Any other information on results incl. tables

Regression formula:

ln(Pa) = 21.4506 - 3553.32 / (207.75 + t(°C))

average deviation of 0.14%

Applicant's summary and conclusion