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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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
Study period:
05.04.2013 - 18.04.2013
Reliability:
1 (reliable without restriction)

Data source

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

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: distillation method
Principles of method if other than guideline:
The temperature at which a liquid boils at atmospheric pressure
GLP compliance:
no
Type of method:
distillation method

Test material

Constituent 1
Chemical structure
Reference substance name:
2,4-dihydro-5-methyl-3H-pyrazol-3-one
EC Number:
203-565-3
EC Name:
2,4-dihydro-5-methyl-3H-pyrazol-3-one
Cas Number:
108-26-9
Molecular formula:
C4H6N2O
IUPAC Name:
2,4-dihydro-5-methyl-3H-pyrazol-3-one
Details on test material:
- Name of test material: 2,4-dihydro-5-methyl-3H-pyrazol-3-one
- Substance type: Organic
- Physical state: solid

Results and discussion

Boiling point
Boiling pt.:
226 °C
Atm. press.:
965 hPa
Decomposition:
no

Applicant's summary and conclusion

Conclusions:
The boiling point of a substance is the (thermal) point at which a liquid substance gains enough thermal energy to become a gas.The boiling point of 2,4-dihydro-5-methyl-3H-pyrazol-3-one by distillation method is observed to be 226 °C at vapour pressure 965 hpa.
Executive summary:

The boiling point of a substance is the (thermal) point at which a liquid substance gains enough thermal energy to become a gas.The boiling point of 2,4-dihydro-5-methyl-3H-pyrazol-3-one by distillation method is observed to be 226 °C at vapour pressure 965 hpa.