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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 257-486-4 | CAS number: 51868-46-3
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:
- from 2016-11-30 to 2016-12-02
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- > 175 °C
- Decomposition:
- yes
- Decomp. temp.:
- 190 °C
- Key result
- Melting / freezing pt.:
- < 178 °C
- Conclusions:
- The test item had a melting range of 175 – 178 °C.
Reference
Individual results
Melting point / melting range: DSC measurement
A DSC measurement in aluminium crucibles with a hole with a heating rate of 10 K/min showed a multistage endothermal effect in the temperature range of 150 – 190 °C, immediately followed by an exothermal. The onset temperature (see Table1) was derived from the intersection of the tangent line with the highest slope of the endothermal peak with the baseline. A 2nd and a 3rd measurement were stopped at 190 °C before the exothermal started. Visual inspection of the crucibles after the 2nd and 3rd measurement showed a melted test item. The results of the DSC measurements are summarized in Table 1.
Table1: Melting point (DSC measurements)
Ident No. |
Test item / mg |
Starting temperature / °C |
Final test temperature / °C |
Temperature range (melting) / °C |
Onset / °C |
Crucible |
Observations after the measurement |
35939 |
8.10 |
25 |
500 |
150 –190 |
177.91 |
Aluminium with a hole |
Test item was black after the measurement: mass loss 32.5 % |
35941 |
8.00 |
25 |
190 |
150 – 185 |
175.71 |
Aluminium with a hole |
The test was melted after the measurement, no mass loss |
35947 |
8.53 |
25 |
190 |
150 – 185 |
175.20 |
Aluminium with a hole |
The test was melted after the measurement, no mass loss |
The test item melted in the temperature range 175 – 178 °C.
Description of key information
The test item had a melting range of 175 – 178 °C.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 175 °C
Additional information
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.
