Registration Dossier
Registration Dossier
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EC number: 249-172-0 | CAS number: 28706-33-4
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:
- March 09th, 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with generally accepted scientific standards and described in sufficient detail
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- adopted July 27, 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: OECD Guideline (Screening Test for Thermal Stability and Stability in Air)
- Version / remarks:
- adopted May 12, 1981
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Decomposition:
- yes
- Decomp. temp.:
- 296 °C
- Conclusions:
- The substance decomposes before melting/boiling at ca 296 °C.
- Executive summary:
The thermal behaviour of the test item was investigated by Differential Scanning Calorimetry method, according to the OECD guidelines 102 and 113. A small amount of test item placed in aluminum closed crucible and inserted into the furnace of the DSC device. The temperature was increased from 25 to 500 °C with 10 °C/minutes heating rate. The measurement was performed under nitrogen atmosphere. The experiment was performed in duplicate.
The endotherm and exotherm peaks in the thermograms do not imply phase transition from a solid to liquid state. Based on the results of the DSC curves and the appearance of test item after the tests, it is concluded the test item started to decompose from 296.5 °C (569.6 K).
Conclusion
The substance decomposes before melting/boiling at ca 296 °C.
Reference
The endotherm and exotherm peaks in the thermograms do not imply phase transition from a solid to liquid state.
Before the test the appearance of the substance was dark red powder; after the experiments, the test item became a black powder in the crucible.
| Sample weight [mg] | Total loss of Mass of the Sample (%) | Onset of effect [°C] | Endset of effect [°C] | Energy [J/g] | |
| Replicate 1 | 4.24 | 26.7 | 298.7 | 342.33 | -193.83 (exothermic) |
| Replicate 2 | 2.83 | 31.1 | 294.25 | 331.14 | -182.38 (exothermic) |
| Mean | - | 28.9 | 296.48 | 336.74 | -188.11 |
Description of key information
The substance decomposes before melting/boiling at ca 296 °C.
Key value for chemical safety assessment
Additional information
OECD 102 - differential scanning calorimetry
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