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EC number: 617-769-9 | CAS number: 858956-08-8
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:
- 2007-06-11 to 2007-06-26
- 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
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Food and Consumer Product Safety Authority (WMA), Den Haag, The Netherlands / National GLP Compliance Monitoring Authority, New Delhi, India
- Type of method:
- capillary method
- Remarks:
- photocell detection
- Key result
- Melting / freezing pt.:
- 140.5 °C
- Atm. press.:
- ca. 1 013 hPa
- Decomposition:
- no
- Remarks on result:
- other: Pressure not reported; normal conditions (ca. 1013 hPa) assumed based on the method used for the determination
- Conclusions:
- The melting point of the substance was determined to be 140.5 °C at ca. 101.3 hPa (OECD Guideline 102, capillary method with photocell detection)
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Study period:
- 2007-06-15 to 2007-07-20
- 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
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Bundesinstitut für Risikobewertung, Berlin, Germany / Food and Consumer Product Safety Authority, Den Haag, The Netherlands / National GLP Compliance Monitoring Authority, New Delhi, India
- Type of method:
- capillary method
- Remarks:
- photocell detection
- Key result
- Melting / freezing pt.:
- 138.9 °C
- Atm. press.:
- ca. 1 013 hPa
- Decomposition:
- no
- Remarks on result:
- other: Pressure not reported; normal conditions (ca. 1013 hPa) assumed based on the method used for the determination
- Conclusions:
- The melting point of the substance was determined to be 138.9 °C at ca. 101.3 hPa (OECD Guideline 102, capillary method with photocell detection)
Referenceopen allclose all
Preliminary Study
The preliminary test indicated that the melting point of the test item was approximately 140.1 ± 0.3 °C. After the melting point, the colour of the test item in the capillaries was clear liquid.
Calibration of Instrument
The melting point of the Diphenylacetic acid was reported by the manufacturer as 146.7 °C. The melting point of the Diphenylacetic acid standard was determined to be 146.3 °C, thus verifying the performance of the instrument. After the melting point, the colour of the reference standard in the capillaries was clear liquid.
Main Study
The summarized results on the melting point of the test item are given in the following table.
| Replication | Melting point [°C] |
| R1 | 140.5 |
| R2 | 140.3 |
| R3 | 140.5 |
| Mean ± s.d. | 140.5 ± 0.1 |
The mean melting point of the test item was determined to be 140.5 ± 0.1 °C. After the melting point, the colour of the test item in the capillaries was clear liquid.
Preliminary Study
The preliminary test indicated that the melting point of the test item was approximately 140.8 ± 0.2 °C. After the melting point of the test item was reached, the color of the test item in the capillary tubes was observed to be colorless.
Calibration of Instrument
The melting point of the Diphenylacetic acid was reported by the manufacturer as 146.7 °C. The melting point of the Diphenylacetic acid standard was determined to be 146.3 °C, thus verifying the performance of the instrument. After the melting point of the test item was reached, the color of the test item in the capillary tubes was observed to be colorless.
Main Study
The summarized results on the melting point of the test item are given in the following table.
REPLICATION |
MELTING POINT, °C |
R1 |
138.7 |
R2 |
138.9 |
R3 |
139.0 |
Mean ± s.d. |
138.9 ± 0.1 |
The mean melting point of the test item was determined to be 138.9 ± 0.1 °C.
After the melting point of the test item was reached, the color of the test item in the capillary tubes was observed to be colorless.
Description of key information
Melting point: 140.5 °C at ca. 1013 hPa (OECD Guideline 102, Capillary Method)
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 140.5 °C
Additional information
In another study performed using photocell detection method (OECD Guideline 102) a melting point of 138.9 °C was measured on a less pure test item, supporting the result obtained from the key study.
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