Benzenesulfonic acid, C10-24-branched and linear alkyl derivs., magnesium salts, overbased

Melting point / freezing point

Administrative data

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

From 18 December 2018 to 05 April 2019

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Cross-reference

Reason / purpose for cross-reference:

reference to same study

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

From 18 December 2018 to 05 April 2019

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:

EU Method A.2 (Boiling Temperature)

Version / remarks:

2016

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling Point)

Version / remarks:

1995

Deviations:

no

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7220 (Boiling Point / Boiling Range)

Version / remarks:

1996

Deviations:

no

GLP compliance:

yes

Type of method:

differential scanning calorimetry

Key result

Decomposition:

yes

Decomp. temp.:

200 °C

Remarks on result:

other: No boiling point up to the decomposition temperature

see IUCLID 4.2 melting point

Conclusions:

Boiling of the substance was not observed below the decomposition temperature of 200°C.

Executive summary:

see IUCLID 4.2 melting point

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2019

Report date:

2019

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Version / remarks:

2016

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Version / remarks:

1995

Deviations:

no

Test guideline 3

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

Test material information

Constituent 1

Reference substance name:

Benzenesulfonic acid, C10-24-branched and linear alkyl derivs., magnesium salts, overbased

EC Number:

948-935-1

Molecular formula:

Molecular formula cannot be determined for this UVCB substance

IUPAC Name:

Benzenesulfonic acid, C10-24-branched and linear alkyl derivs., magnesium salts, overbased

Test material form:

liquid: viscous

Details on test material:

Batch (Lot) Number: R18 14728
Expiry date: 08 October 2020 (expiry date)
Physical Description: Dark amber viscous liquid
Purity/Composition: UVCB
Storage Conditions: At room temperature

Results and discussion

Melting / freezing point

Key result

Melting / freezing pt.:

-79.1 °C

Decomposition:

yes

Decomp. temp.:

200 °C

Remarks on result:

other: Glass transition temperature: -79.1°C. No melting/freezing temperature between 25°C and -90°C.

Any other information on results incl. tables

DSC EXPERIMENT 1

During cooling: no effects. During heating: small effect between -90°C and -75°C followed by endothermic effect starting at 200°C.  The small effect was most likely due the glass transition. 

After the experiment, a light yellow molten residue remained in the sample container (original colour: dark amber) and a yellow residue was observed on the lid of the sample container. Due to the colour change, the endothermic effect was considered reaction and/or decomposition. DSC curve: see illustration below.

 

DSC EXPERIMENT 2

In order to investigate the small effect between -90°C and -75°C, the temperature was isothermal for 60 minutes at -90°C. During heating at 5°C/minute glass transition was observed between -90°C and -75°C with the inflection point at -79.008°C. After the experiment, the residue in the sample container was unchanged. DSC curve: see illustration below.

 

DSC EXPERIMENT 3

Experiment 3 is a duplicate of Experiment 2 and similar results were obtained. The inflection point was -79.157°C. DSC curve: see illustration below.

 

RESULT

Glass transition temperature: mean inflection point of Experiment 2 (-79.008°C) and Experiment 3 (-79.157°C).

 

Applicant's summary and conclusion

Conclusions:

A glass transition temperature of -79.1°C was determined. The substance has no melting/freezing temperature between 25°C and -90°C.

Executive summary:

Differential Scanning Calorimetry was performed. 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 viscous substance has no melting/freezing temperature between 25°C and -90°C. The mean (n=2) glass transition temperature was determined to be -79.1°C.

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