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EC number: 810-797-4 | CAS number: 331711-99-0
Melting point / freezing point
Administrative data
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 015
- Report date:
- 2015
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- thermal analysis
Test material
- Reference substance name:
- 8-(benzoyloxy)naphthalen-1-yl benzoate
- EC Number:
- 810-797-4
- Cas Number:
- 331711-99-0
- Molecular formula:
- C24 H16 O4
- IUPAC Name:
- 8-(benzoyloxy)naphthalen-1-yl benzoate
- Reference substance name:
- Thane 003-6
- IUPAC Name:
- Thane 003-6
- Test material form:
- solid: particulate/powder
- Remarks:
- migrated information: powder
- Details on test material:
- Name of test material (as cited in study report): 1,8-Naphthalenediol , 1,8-dibenzoate
Physical state: solid
Analytical purity: 99.0 g / 100 g via 1H-NMR spectroscopy
Lot/batch No.: CHPC021814NDB
Expiration date of the lot/batch: Jul29, 2014
Storage condition of test material: Room temperature, protected from moisture
Constituent 1
Constituent 2
Results and discussion
Melting / freezing point
- Melting / freezing pt.:
- 179 °C
- Atm. press.:
- 1 013.25 hPa
Any other information on results incl. tables
Results in detail
Melting temperature
Determination |
Onset temperature [°C] |
Peak temperature [°C] |
A |
179.5 |
181.6 |
B |
179.3 |
181.2 |
Mean value |
179 |
181 |
The estimated accuracy is ± 1 °C.
Observed thermic processes
After the 1 st heating the test item did not recrystallize in the same way. A sharp endothermic peak was found at 159 °C onset temperature in the 2nd heating. This might be the melting of another polymorphic form of the test item.
In order to survey the thermic behavior of the test item a preliminary TG/DTA-Test (non-GLP) was run up to 600 °C.
An endothermic peak starting at about 250 °C with a weight loss of 98 % at 400 °C showed the vaporization of the test item.
Applicant's summary and conclusion
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