Registration Dossier
Registration Dossier
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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:
- from 2019-02-26 to 2019-03-12
- 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:
- 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- 2008
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- differential scanning calorimetry
- Key result
- Melting / freezing pt.:
- >= -32 - <= -17 °C
- Atm. press.:
- >= 1 020.3 - <= 1 021.6 hPa
- Decomposition:
- no
- Sublimation:
- no
- Conclusions:
- The melting range of the test item was determined in the temperature range of -32 °C to -17 °C.
- Executive summary:
An experimental study was conducted to determine the melting point of the test item according to OECD Guideline 102 and Regulation (EC) No 440/2008, Method A.1 using differential scanning calorimetry. An exothermic effect (freezing) at a temperature of approx. -40 °C was observed. In the temperature range of -40 to 0 °C (double peak) an endothermic effect (melting), was observed.
Due to the double melting peak, the melting of the test item was verified. 5.3 g of the test item in a test tube were cooled down with liquid nitrogen to approx. -115 °C. At that temperature the test item is a crystalline, white solid. In the temperature range of -72 to approx. -30 °C the test item was a white milky solid. The test item started to melt at -29 °C and at -17 °C the test item was completely molten. The melting range of the test item was determined in the temperature range of -32 °C to -17 °C.
Reference
An exothermic effect (freezing) at a temperature of approx. -40 °C was observed. In the temperature range of -40 to 0 °C (double peak) an endothermic effect (melting), was observed.
Due to the double melting peak, the melting of the test item was verified. 5.3 g of the test item in a test tube were cooled down with liquid nitrogen to approx. -115 °C. At that temperature the test item is appears a crystalline, white solid. In the temperature range of -72 to approx. -30 °C the test item was white milky solid. The test item started to melt at -29 °C and at -17 °C the test item was completely molten. Therefore, the test item melted in the temperature range of -32 °C to -17 °C as determined by differential scanning calorimetry.
Description of key information
The melting range of the test item was determined in the temperature range of -32 °C to -17 °C.
Key value for chemical safety assessment
Additional information
An experimental study was conducted to determine the melting point of the test item according to OECD Guideline 102 and Regulation (EC) No 440/2008, Method A.1 using differential scanning calorimetry. An exothermic effect (freezing) at a temperature of approx. -40 °C was observed. In the temperature range of -40 to 0 °C (double peak) an endothermic effect (melting), was observed.
Due to the double melting peak, the melting of the test item was verified. 5.3 g of the test item in a test tube were cooled down with liquid nitrogen to approx. -115 °C. At that temperature the test item is a crystalline, white solid. In the temperature range of -72 to approx. -30 °C the test item was a white milky solid. The test item started to melt at -29 °C and at -17 °C the test item was completely molten. The melting range of the test item was determined in the temperature range of -32 °C to -17 °C.
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