Registration Dossier
Registration Dossier
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EC number: 486-670-9 | 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:
- 08 November to 13 December 2007
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study without detailed documentation
- Remarks:
- The study was conducted according to an internationally recognised method, and under GLP. The substance is adequately identified, but details on composition are missing. Therefore validation applies with restrictions.
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Principles of method if other than guideline:
- Not applicable
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- effective 16 March 2007 (validity 18 months)
- Type of method:
- differential scanning calorimetry
- Specific details on test material used for the study:
- Storage conditions of test material: Stored at room temperature protected from direct sun light.
- Key result
- Melting / freezing pt.:
- -121.1 °C
- Decomposition:
- no
- Executive summary:
The melting point of the test substance was determined under GLP according to EU Method A.1 by using differential scanning calorimetry (DSC).
Three main runs were performed, and the mean final temperature was retained.
The melting temperature of the test substance was determined to be -121.1 °C.
Reference
Table 4.2/1: Melting point – results
Test no. |
Start temperature |
Heating rate |
Onset temperature |
1 |
-180 °C |
+10 °C/min |
-121.0 °C |
2 |
-150 °C |
+10 °C/min |
-121.2 °C |
3 |
-150 °C |
+10 °C/min |
-121.2 °C |
Mean ± S.D. |
-121.1 °C ± 0.1 °C |
||
Three successive tests were retained.
Mean onset for melting occurred at -121.1 °C ± 0.1 °C. The validity criteria were fulfilled: the standard deviation within the three replicate assessments did not exceed 0.5 °C. Therefore the average value is retained as final result.
Reference material: Ethanol. Nominal onset for boiling = 78.2 ± 0.5 °C. Measured onset = 78.3 °C
Description of key information
Experimental melting point (i.e. transition from solid to liquid) = -121.1°C.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- -121.1 °C
Additional information
A reliable experimental study, conducted according to a recognized EC method and under GLP, is available.
Despite minor restrictions due to incomplete test item identification, it is considered as key study, and the result is retained as key data.
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.
