Registration Dossier
Registration Dossier
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EC number: 223-529-0 | CAS number: 3943-89-3
Melting point / freezing point
Administrative data
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 27 June 2017 to 27 September 2016
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 016
- Report date:
- 2016
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7200 (Melting Point / Melting Range)
- Principles of method if other than guideline:
- Differential Scanning Calorimetry (DSC):
This technique records the difference in heat flow of two crucibles, one filled with test item and the other left empty as reference, while these crucibles are subjected to a controlled temperature programme. A transition of the test item, such as melting or evaporation, is indicated by a deviation from the base line in the heat flow record. Because melting and evaporation are processes in which heat is consumed, the deviation from the base line is in the endothermic direction for these processes. The melting temperature or boiling temperature (if any) of the test item is evaluated from the DSC curve as the extrapolated onset temperature of the endothermic melting or evaporation peak. - GLP compliance:
- yes
- Type of method:
- differential scanning calorimetry
Test material
- Reference substance name:
- Ethyl 3,4-dihydroxybenzoate
- EC Number:
- 223-529-0
- EC Name:
- Ethyl 3,4-dihydroxybenzoate
- Cas Number:
- 3943-89-3
- Molecular formula:
- C9H10O4
- IUPAC Name:
- ethyl 3,4-dihydroxybenzoate
- Test material form:
- solid: particulate/powder
Constituent 1
Results and discussion
Melting / freezing point
- Key result
- Melting / freezing pt.:
- >= 128.8 - <= 133.3 °C
- Decomposition:
- yes
- Decomp. temp.:
- >= 200 °C
Any other information on results incl. tables
For the calculation of the melting point the results of exp 1 and exp 2 (first run) were used.
In the preliminary test the weight of the substance decreased from 200 °C onwards (75% at 320 °C). After this test a black molten residue was found in the container
Applicant's summary and conclusion
- Conclusions:
- The melting point of the substance is 128.8 – 133.3°C (402 – 406K)
- Executive summary:
Using the DSC method the melting point of the substance was assessed in 2 experiments to be 128.8 – 133.3°C (402 – 406K).
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