Registration Dossier
Registration Dossier
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EC number: 282-104-8 | CAS number: 84100-23-2
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
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- thermal analysis
- Specific details on test material used for the study:
- Purity: 92.7 g/100 g (for the two diastereomers), by quantitative 1HNMR spectroscopy
- Key result
- Melting / freezing pt.:
- <
- Atm. press.:
- ca. 1 013.25 hPa
- Decomposition:
- no
- Sublimation:
- no
- Remarks on result:
- other: No melting temperature was found between -100 °C and 50 °C
- Remarks on result:
- other: A reproducible glass transition was found at -80 °C
Reference
No melting temperature was found between -100 °C and 50 °C, even by addition of aluminum oxide powder as crystallization aid (Test 1).
A reproducible glass transition was found at -80 °C in the 1 st heating.
(determination A and B).
Determination |
Glass transition temperature [0C] |
A |
-80.1 |
B |
-79.6 |
Mean value |
-80 |
Observed thermic processes
In order to survey the thermic behavior of the test item a preliminary TG/DTA-Test (non-GLP) was run up to 620 °C.
Two endothermic peaks at about 80 °C and 150 °C peak temperature with a weight lass of 68 % at 250 °C show the beginning of the vaporization of the test item
Description of key information
No melting temperature was found between -100 °C and 50 °C, even by addition of aluminum oxide powder as crystallization aid (Test 1).
A reproducible glass transition was found at -80 °C in the 1st heating.
Key value for chemical safety assessment
Additional information
In a non GLP supporting study (BASF, K 563,1980) with limited documentation the solidification temperature of the subcooled liquid was determined to be 2.91 °C at 1013.25 hPa.
A BASF GLP study (14L00334) determined mo melting temperature between -100 °C and 50 °C. but a reproducible glass transition was found at -80 °C in the 1st heating. The study is regarded to be reliable for the substance and therfore was chosen as key value for the melting point.
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