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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 284-748-5 | CAS number: 84962-50-5
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 05, 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 113 (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.:
- 257.9 °C
- Conclusions:
- The substance decomposes before melt/boil at ca 258 °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 cosed 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. A supplementary test was run, in order to clarify the substance thermal behavior. A small amount of test item was weighed into a one-way 40 µl aluminum crucible and sealed with closed aluminum lid using a capsule presser. Thus, prepared capsule was inserted into the furnace of the DSC device and heated from 25 to 150, 230, 260 and 330 °C with 10 °C/minutes heating rate, than cooled down to 25 °C. Before and after the test, the weight and the appearance of the sample were determined.
Based on the results of the DSC curves and the appearance of the test item after the tests, it is concluded the test item started to decompose from 257.9 °C (531.0 K).
Conclusion
The substance decomposes before melt/boil at ca 258 °C.
Reference
Before the test, the appearance of the substance was orange powder; after the experiments the test item was blackened and its volume increased in the crucible.
| Sample weight [mg] | Total loss of Mass (%) | Peak | Onset of effect [°C] | Endset of effect [°C] | Left Limit [°C] | Right Limit [°C] | Energy [J/g] | |
| Replicate 1 | 3.63 | 46.8 | 1 | 125.61 | 130.57 | 119.87 | 133.55 | -7.58 (exothermic) |
| Replicate 2 | 4.33 | 44.8 | 124.48 | 128.18 | 121.51 | 128.23 | -5.70 (exothermic) |
|
Mean |
125.045 | 129.375 | 120.69 | 130.89 | 6.64 | |||
| Replicate 1 | 3.63 | 46.8 | 2 | 139.14 | 145.8 | 133.60 | 150.16 | 21.91 (endothermic) |
| Replicate 2 | 4.33 | 44.8 | 128.24 | 147.64 | 128.24 | 154.03 | 28.97 (endothermic) |
|
Mean |
133.69 | 146.72 | 130.92 | 152.10 | 25.44 | |||
| Replicate 1 | 3.63 | 46.8 | 3 | 209.68 | 226.96 | 203.20 | 236.86 | 39.96 (endothermic) |
| Replicate 2 | 4.33 | 44.8 | 219.59 | 232.99 | 203.88 | 238.93 | 45.44 (endothermic) |
|
Mean |
214.635 | 229.975 | 203.54 | 237.90 | 42.7 | |||
| Replicate 1 | 3.63 | 46.8 | 4 | 287.05 | 333.71 | 256.19 | 334.23 | -94.51 (exothermic) |
| Replicate 2 | 4.33 | 44.8 | 297.71 | 331.45 | 259.56 | 332.17 | -82.33 (exothermic) |
|
Mean |
292.38 | 332.58 | 257.88 | 333.20 | -88.42 | |||
| Replicate 1 | 3.63 | 46.8 | 5 | 343.5 | 354.7 | 334.20 | 354.63 | -146.36 (exothermic) |
| Replicate 2 | 4.33 | 44.8 | 340.72 | 351.1 | 332.25 | 353.04 | -130.67 (exothermic) |
|
Mean |
342.11 | 352.9 | 333.23 | 353.84 | -138.51 | |||
During the heating up phase three endotherm and two exotherm peaks were observed up to 330 °C. During the cooling down phase no thermal effects were observed from 330 to 25 °C.
| Sample weight [mg] | Measured temperature range (°C) | Loss of Mass (%) | Observation |
| 4.47 | 25 - 150 | 1.8 | orange powder |
| 4.29 | 25 - 230 | 4.9 | dark orange powder |
| 3.92 | 25 - 260 | 7.4 | dark orange powder |
| 2.63 | 25 - 330 | 13.3 | black, cohered powder |
Description of key information
The substance decomposes before melt/boil at ca 258 °C.
Key value for chemical safety assessment
Additional information
OECD 102/113 - Differential Scanning Calorimetry method
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.
