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EC number: - | 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:
- 02 June 2016 - 16 June 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)
- Version / remarks:
- 27 July 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7200 (Melting Point / Melting Range)
- Version / remarks:
- 1998
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- > 2.6 - < 3.7 °C
- Atm. press.:
- > 1 006 - < 1 008 hPa
- Decomposition:
- yes
- Remarks:
- Decomposition energy of -270 J/g
- Decomp. temp.:
- > 380 - < 470 °C
- Conclusions:
- The test Item reaction mass of N-butylphthalimide and N-sec-phthalimide and N-propylphthalimide has a melting range of 2.6 to 3.7 °C at atmospheric pressure (1006 or 1008 hPa, respectively ) as determined by differential scanning calorimetry according to Regulation EC No. 440/2008 Method A.1. and OECD Test Guideline 102 (1995).
- Executive summary:
The test item reaction mass of N-butylphthalimide and N-sec-phthalimide and N-propylphthalimide has a melting range of 2.6 to 3.7 °C at atmospheric pressure (1006 or 1008 hPa, respectively) as determined by differential scanning calorimetry according to Regulation EC No. 440/2008 Method A.1. and OECD Test Guideline 102 (1995).
Reference
During the cooling phase an exothermic effect could be observed in the temperature range of approximately -10 to -30 °C, which can be assigned to the freezing of the test item. In the subsequent heating phase an endothermic effect was detected inthe temperature range of -10 to 20 °C, which can be assigned to the melting of the test item. As the onset temperatures in both tests deviate by more than 0.5 K from their mean value of 3.12 °C, the test item has a melting range of 2.6 to 3.7 °C.
Due to the low energy of the melting peak, the melting of the test item was verified. A small amount of the test item in a test tube was cooled down to -24.5 °C in a freezer. At this temperature the test item was solid. For warming up, the frozen sample was placed in a refrigerator at 3.5 °C. After eight hours the sample was still frozen. After 10 minutes at room temperature the test item was liquefied. Therefore the melting point in the DSC-measurement was confirmed.
No. |
Sample weight / mg |
Onset of Effect / °C |
Range of effect / °C |
Weight loss / mg |
Atmospheric pressure / hPa |
Remark |
PN11224 |
14.49 |
3.65 |
-10 – 20 (endo) |
14.49 |
1007.9 |
Figure 1 |
PN11234 |
16.70 |
2.59 |
0 – 20 (endo) |
16.58 |
1005.9 |
Figure 2 |
Description of key information
The test item has a melting range of 2.6 to 3.7 °C at atmospheric pressure (1006 or 1008 hPa, respectively) as determined by differential scanning calorimetry according to Regulation EC No. 440/2008 Method A.1. and OECD Test Guideline 102 (1995).
Key value for chemical safety assessment
Additional information
Melting point range of 2.6 to 3.7 °C.
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