Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 941-809-7 | CAS number: -
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2015-03-05 to 2015-03-06
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- adopted on 27 July 1995
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- Council Regulation (EC) No 440/2008 of 30 May 2008
- Qualifier:
- according to guideline
- Guideline:
- other: DIN EN ISO 3146:2002-06 Plastics
- Version / remarks:
- Determination of melting behaviour (melting temperature or melting range) of semi-crystalline polymers by capillary tube and polarizing-microscope methods
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- capillary method
- Key result
- Decomposition:
- yes
- Remarks on result:
- other: The measuring device used for the capillary method did not allow to check the course of the test by direct visual observation. But the observations after the end of the test supported the assumption that the test item had changed.
- In parallel to the tests presented in this report,differential scanning calorimetry (DSC) measurements were performed (AQura GmbH,AN-ASB 0669.1; 2015) to determine the melting point of the test item with a second method. These experiments clearly showed that no melting occurred before decomposition.
- The measuring device used for the capillary method did not allow to check the course of the test by direct visual observation. But the observations after the end of the test supported the assumption that the test item had changed.
- The single values measured varied relative widely with a high standard deviation.
- Conclusions:
- No melting point could be observed, probably decomposition of the substance occured.
- Executive summary:
The melting/freezing temperature of the substance was determined according to OECD guideline no. 102 [adopted on 27 July 1995] and EU test method A.1 [Council Regulation (EC) No 440/2008] with the capillary method. No melting point could be observed in the tested temperature range; probably decomposition of the substance occurred.
- Endpoint:
- melting point/freezing point
- Remarks:
- DSC method
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2015-02-18 to 2015-03-02
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- adopted on 27 July 1995
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- Council Regulation (EC) No 440/2008 of 30 May 2008
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Remarks:
- with preliminary thermogravimetric measurement
- Key result
- Decomposition:
- yes
- Decomp. temp.:
- >= 150 °C
- Remarks on result:
- other: No melting point could be observed
- Conclusions:
- No melting point was observed, but decomposition starting at approximately 150 °C.
- Executive summary:
The melting temperature of the test item was determined by differential scanning calorimetry according to OECD Test Guideline 102 [adopted on 27 July 1995] and EU test method A.1 “Melting/freezing temperature”, Council Regulation (EC) No 440/2008 of 30 May 2008 at atmospheric pressure.
The course of the thermographic curve indicated no melting point but decomposition of the test item. The residue looked black and foamy, coming through the hole of the crucible. A preliminary thermogravimetric test had shown evidence for decomposition starting at approx. 150 °C.
No melting point could be observed until decomposition started at approximately 150 °C.
Referenceopen allclose all
Visual observations:
Before the measurements the test item was a white solid. After the test the samples looked clear and slightly beige. Also, inside the capillaries the test item was nothomogeneouslydistributed but some gaps (possibly due to gas generation) could be observed.
|
Melting temperature [°C] |
First run |
67.4 |
Second run |
66.1 |
Third run |
61.3 |
Mean value |
65.0 |
Standard deviation |
3.2 |
Discussion
In general, it had to be concluded that no melting occurred but probably decomposition. This was based on the following point:
A preliminary thermogravimetric measurement was performed over a temperature range from room temperature to approx. 600 °C. Several mass loss steps were registered with a total mass loss of 77.2 %, including the mass loss during initial purging with nitrogen (0.4 %). The residue was probably not pure inorganic but also organic material.
The course of the thermographic curve indicates no melting but decomposition of the test item.
The residue looked black and foamy, coming through the hole of the crucible.
Two DSC measurements were performed in the temperature range from 20 – 250 °C, since the thermogravimetric test had shown evidence for decomposition starting at approx. 150 °C. The course of the heat flow curves confirmed the results of the thermogravimetric measurement. No sharp endothermic peak indicating a melting point could be observed.
Reweighing after the measurement showed that the sample had lost approx. 11.0 / 12.2 % of its mass. The remaining residues looked dark-brown and foamy, coming through the hole of the crucible.
Description of key information
No melting point could be observed until decomposition started at approximately 150 °C.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 150 °C
Additional information
The melting point of Sophorolipids was determined by two different methods, i.e. by the capillary method as well as by the DSC method. In both cases no melting point could be observed. Instead, decomposition at a temperature of ca. 150 °C occurred as observed in the DSC measurement.
In conclusion, no melting point could be observed until decomposition started at approximately 150 °C.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
