Butyl toluene-4-sulphonate

Melting point / freezing point

Link to relevant study record(s)

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

27 February 2020 to 13 March 2020

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Version / remarks:

27 July 1995

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Version / remarks:

4 March 2016

Deviations:

no

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7200 (Melting Point / Melting Range)

Version / remarks:

March 1998

Deviations:

no

GLP compliance:

yes

Type of method:

differential scanning calorimetry

Specific details on test material used for the study:

- Purity/Composition correction factor: No correction factor required

Key result

Melting / freezing pt.:

< -83.6 °C

Atm. press.:

1 013.25 hPa

Preliminary Test

Starting at 225 °C, the weight of the sample decreased significantly. At 247 °C, the sample weight had decreased by 25 %.

After the experiment, a black charred residue remained in the sample container (original colour: colourless). The change of the colour indicated reaction and/or decomposition of the test material.

Main Study

The DSC curve obtained is attached.

During cooling, no effects were observed. During heating an endothermic effect was observed starting at 175 °C. The endothermic effect was probably obtained due to reaction and/or decomposition of the test material.

After the experiment, a black molten residue remained in the sample container (original colour: colourless). The change of the colour indicated reaction and/or decomposition of the test material.

After the additional investigation of the melting temperature of the test material was performed (placing two sub-samples of the test material for 94 hours at -20.3 ± 2 °C and at -83.6 ± 1.7 °C respectively) it was observed after storage that the test material was a liquid (-20.3 ± 2 °C) and a very viscous liquid (-83.6 ± 1.7 °C). According to this it was concluded that the melting temperature of the test material is < -83.6 °C (<189.6 K).

Conclusions:

Under the conditions of the study, the melting temperature of the test material was determined to be < -83.6 °C (189.6 K) at 1013.25 hPa applying a storage experiment in the freezer.

Executive summary:

The melting temperature of the test material was investigated in a study which was conducted in accordance with the standardised guidelines OECD 102, EU Method A.1 and EPA OPPTS 830.7200, and under GLP conditions.

During the study, the melting and boiling temperature of the test material were tested by DSC.

Under the conditions of the study, the melting temperature of the test material was determined to be < -83.6 °C (189.6 K) at 1013.25 hPa applying a storage experiment in the freezer.

Description of key information

Under the conditions of the study, the melting temperature of the test material was determined to be < -83.6 °C (189.6 K) at 1013.25 hPa applying a storage experiment in the freezer.

Additional information

The melting temperature of the test material was investigated in a study which was conducted in accordance with the standardised guidelines OECD 102, EU Method A.1 and EPA OPPTS 830.7200, and under GLP conditions. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).

During the study, the melting and boiling temperature of the test material were tested by DSC.

Under the conditions of the study, the melting temperature of the test material was determined to be < -83.6 °C (189.6 K) at 1013.25 hPa applying a storage experiment in the freezer.