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EC number: 265-016-4 | CAS number: 64683-40-5
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:
- 16/03/16, 05/05/2016 and 24/05/2016
- 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:
- no
- Other quality assurance:
- other: ISO9001-2008
- Remarks:
- TECNIO network
- Type of method:
- differential scanning calorimetry
- Key result
- Decomposition:
- yes
- Decomp. temp.:
- 187 °C
- Remarks on result:
- not determinable
- Remarks:
- the substance decomposes before melting
- Conclusions:
- The substance decomposes at 187ºC without melting
- Executive summary:
A first DSC has been done and the sample has shown an endothermic phenomenon starting at 187ºC with an associated heat of 330.6 J/g
In view of these results, the same sample has been analysed by DSC-HP (in inert atmosphere, nitrogen) showing an exothermic phenomenon from 197°C with a peak at 208°C and an associated heat of 362.9 J/g which could be attributed to the thermal decomposition of the sample.
The sample sample has been by TGA showing a first weight loss of 7.9% from 30°C to 224°C, a second weight loss of 8.9% from 224°C to 278°C and a third weight loss of 32.5% from 280°C to 598°C.
Reference
| Differential Scanning Calorimetry (DSC) | High-Pressure Diferential Scanning Calorimetry (DSC-HP) | Thermogravimetric analysis (TGA): | |
| Equipment | Mettler Toledo DSC-822e | Mettler Toledo DSC-822e | Mettler Toledo TGA/SDTA851e |
| Crucible | Aluminium crucible with a capacity of 40 microL. | gold plated high pressure crucible with a capacity of 30 microL (hermetically sealed until 150 bar) | Alumina crucible with a capacity of 70 microL. |
| Gas | dry nitrogen at 50mL/min | dry nitrogen at 50 mL/min | Dry nitrogen 50 mL/min. |
| Method | Heating from 30ºC to 600ºC at a rate of 10ºC/min | Heating from 30ºC to 400ºC at a rate of 10ºC/min | Heating from 30°C to 600°C at a rate of l0ºC/min. Previously, a blank curve has been performed and it has been subtracted. |
Description of key information
The determination has been done using DSC and DSC-HP (inert atmosphere with nitrogen) techniques.
The substance decomposes at 187ºC without melting.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 300 °C
Additional information
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