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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
07 Jan 2019 - 14 Feb 2019
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2019
Report date:
2019

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
2016
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
1995
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
Version / remarks:
1998
Deviations:
no
GLP compliance:
yes
Type of method:
differential scanning calorimetry

Test material

Constituent 1
Chemical structure
Reference substance name:
(S)-2-(5-Oxo-3-propyl-1,2-dihydropyrrol-1-yl) butyramide
Cas Number:
357338-13-7
Molecular formula:
C11H18N2O2
IUPAC Name:
(S)-2-(5-Oxo-3-propyl-1,2-dihydropyrrol-1-yl) butyramide
Test material form:
solid: particulate/powder
Details on test material:
- Appearance: Off-white powder
- Storage condition of test material: In refrigerator protected from light

Results and discussion

Melting / freezing point
Key result
Melting / freezing pt.:
>= 76.1 - <= 84.1 °C

Any other information on results incl. tables

TGA EXPERIMENT (PRELIMINARY TEST)

Decrease of weight from 300°C upwards: 25% at 317°C.

After the experiment, a brown molten residue remained in the sample container.

The change of the colour indicated reaction and/or decomposition of the test item.

DSC EXPERIMENT 1

Two endothermic effects were observed between 50°C and 100°C followed by an endothermic effect starting at ca. 250°C.

The temperature at maximum of the first effect was 76.411°C and the temperature at maximum of the second effect was 84.509°C.

The endothermic effects were most likely caused by melting of the test item. The third endothermic effect was probably caused by reaction and/or decomposition of the test item.

After the experiment, a yellow molten residue remained in the sample container.

The change of the colour indicated reaction and/or decomposition of the test item.

DSC EXPERIMENT 2

In order to investigate the endothermic effects, in Experiment 2 heating was stopped directly after the melting effects.

The temperature at maximum of the first effect was 75.688°C and the temperature at maximum of the second effect was 83.598°C.

After the experiment, a molten residue that lost its colour remained in the sample container. It demonstrated that melting was the reason for the endothermic effect.

DATA HANDLING

As the melting temperature of the test item could not be determined accurately due to the two effects observed, the melting temperature is reported as a melting range from 76.1°C to

84.1°C, reflecting the mean temperature at maximum of the first effect and the mean temperature at maximum of the second effect.

Applicant's summary and conclusion

Conclusions:
The melting range of the substance was determined to be 76.1°C – 84.1°C. Reaction and/or decomposition of the test item was observed starting at approximately 250°C.
Executive summary:

Differential Scanning Calorimetry was performed to determine the melting and boiling temperature. The experiments were based on EC A.1, OECD 102 and OPPTS 830.7200 (melting temperature) and on EC A.2, OECD TG 103 and OPPTS 830.722 (boiling temperature). GLP-study.

The melting range of the substance was determined to be 76.1°C – 84.1°C.

Boiling of the substance was not observed below the temperature at which reaction and/or decomposition started (i.e. at 250°C).