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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
explosive properties of explosives
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2017
Report date:
2017

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: regulation EG No 1272/2008
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
3-methyl-1-phenyl-5-pyrazolone
EC Number:
201-891-0
EC Name:
3-methyl-1-phenyl-5-pyrazolone
Cas Number:
89-25-8
Molecular formula:
C10H10N2O
IUPAC Name:
5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one

Results and discussion

Results of test series for explosives
Key result
Test series:
other: not specified
Method:
other: differential scanning calorimetry
Parameter:
other: decomposition energy (J/g)
Value:
-92
Result:
result is considered "-" (negative)

Applicant's summary and conclusion

Interpretation of results:
GHS criteria not met
Conclusions:
The onset temperature of the most exothermal decomposition reaction was T(onset)= 403°C. The decomposition energy was -92 +/- 5.5 J/g (expanded measurement uncertainty).
Since the absolute value of the decomposition energy was far below 500 g/J, the substance can be classified as non-explosive.