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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Boiling point

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Administrative data

Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Scientifically acceptable study with detailed information

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1992
Report date:
1992

Materials and methods

Test guideline
Qualifier:
equivalent or similar to guideline
Guideline:
other: OECD 104
GLP compliance:
no
Type of method:
dynamic method
Remarks:
with argon

Test material

Constituent 1
Chemical structure
Reference substance name:
4-methylpyrazole
EC Number:
231-445-0
EC Name:
4-methylpyrazole
Cas Number:
7554-65-6
Molecular formula:
C4H6N2
IUPAC Name:
4-methyl-1H-pyrazole
Test material form:
other: liquid
Details on test material:
Name of test material (as cited in study report): 4-Methylpyrazol
Analytical purity: 99,3% (by GC)

Results and discussion

Boiling point
Boiling pt.:
207.25 °C
Atm. press.:
1 013.25 hPa

Any other information on results incl. tables

Results:

Temperature

[°C]

Vapour pressure (exp.)

[hPa]

Vapour pressure (calc.)

[hPa]

Aberration

[%]

51.67

1.00

0.992

0.77

61.74

2.00

2.00

-0.07

67.96

3.00

3.01

-0.18

76.22

5.00

5.01

-0.22

81.96

7.00

7.02

-0.31

88.32

10.00

10.04

-0.43

101.44

20.00

20.02

-0.12

109.74

30.00

30.05

-0.16

120.84

50.00

50.02

-0.05

128.57

70.00

69.89

0.16

137.23

100.0

99.79

0.21

155.43

200.0

199.2

0.40

167.11

300.0

299.3

0.23

182.95

500.0

499.5

0.10

194.19

700.0

700.5

-0.07

206.90

1000.0

1004.0

-0.37

207.25

-

1013.25

-

The normal boiling temperature was obtained by intrapolation/extrapolation from the vapour pressure curve.

Applicant's summary and conclusion