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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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 Nov 2017 - 24 Nov 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018
Report date:
2018

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
2008
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:
2-(2-thienyl)ethyl toluene-p-sulphonate
EC Number:
254-911-5
EC Name:
2-(2-thienyl)ethyl toluene-p-sulphonate
Cas Number:
40412-06-4
Molecular formula:
C13H14O3S2
IUPAC Name:
2-(thiophen-2-yl)ethyl 4-methylbenzene-1-sulfonate
Test material form:
solid: particulate/powder
Details on test material:
- Physical appearance: white to off-white powder
- Test item storage: at room temperature

Results and discussion

Melting / freezing point
Key result
Melting / freezing pt.:
33.6 °C

Any other information on results incl. tables

TGA EXPERIMENT (PRELIMINARY TEST)

Significant decrease of weight from 225°C. 25% weight loss at 263°C.

After the experiment, a black molten residue remained in the sample container, indicating reaction and/or decomposition of the test item.

 

DSC EXPERIMENT 1

An endothermic peak was observed between 25°C and 50°C followed by a strong exothermic effect between 200°C and 225°C. The extrapolated onset temperature of the first peak was 33.581°C. The endothermic effect was most likely caused by melting of the test item. The exothermic effect was ascribed to reaction and/or decomposition of the test item. After the experiment, a black molten residue remained in the sample container. Based on this visual observation, it was concluded that the test item had molten and the change of the colour demonstrated reaction and/or decomposition of the test item.

DSC EXPERIMENT 2

In order to investigate the melting peak, in Experiment 2 heating was stopped directly after the melting peak. The extrapolated onset temperature was 33.652°C. After the experiment, a colourless molten residue remained in the sample container. It demonstrated that melting was the reason for the endothermic effect.

DATA HANDLING

The melting temperature was determined as the mean extrapolated onset temperature of Experiment 1 and Experiment 2.

Applicant's summary and conclusion

Conclusions:
The melting temperature of the substance was determined to be 33.6°C.
Executive summary:

Differential Scanning Calorimetry (DSC) experiments were performed in a GLP study according to EC A.1, OECD 102 and OPPTS 830.7200.

The melting temperature of the substance was determined in duplicate obtaining a mean value of 33.6°C.

Boiling of the substance was not observed below the temperature at which reaction and/or decomposition started (i.e. at 200°C).