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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2013
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: according to valid method (DSC)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2013
Report date:
2013

Materials and methods

Principles of method if other than guideline:
Differential Scanning Calorimetry
GLP compliance:
not specified
Type of method:
thermal analysis

Test material

Constituent 1
Chemical structure
Reference substance name:
3-methyl-1-p-tolyl-5-pyrazolone
EC Number:
201-708-4
EC Name:
3-methyl-1-p-tolyl-5-pyrazolone
Cas Number:
86-92-0
Molecular formula:
C11H12N2O
IUPAC Name:
3-methyl-1-p-tolyl-5-pyrazolone

Results and discussion

Melting / freezing point
Melting / freezing pt.:
133 °C
Atm. press.:
ca. 1 atm
Decomposition:
yes
Decomp. temp.:
>= 261 °C
Remarks on result:
other: The product starts to decompose in the sealed vial at 261°C with a mean energy of 162 J/g

Applicant's summary and conclusion

Conclusions:
The substance melts at 133°C and starts to decompose at 261°C with a mean energy of 162 J/g. A Differential Scanning Calorimeter was used for testing.
Executive summary:

The substance melts at 133°C and starts to decompose at 261°C with a mean energy of 162 J/g. A Differential Scanning Calorimeter was used for testing.