Registration Dossier
Registration Dossier
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EC number: 232-458-4 | CAS number: 8046-19-3 Extractives and their physically modified derivatives. It is a product which may contain resin acids and their esters, terpenes, and oxidation or polymerization products of these terpenes. (Liquidambar styraciflua, Hamamelidaceae).
Melting point / freezing point
Administrative data
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 18 Sep 2017 - 02 Oct 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 017
- Report date:
- 2017
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7200 (Melting Point / Melting Range)
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- differential scanning calorimetry
Test material
- Reference substance name:
- Storax (balsam)
- EC Number:
- 232-458-4
- EC Name:
- Storax (balsam)
- Cas Number:
- 8046-19-3
- Molecular formula:
- Not applicable, UVCB - NCS
- IUPAC Name:
- Storax (balsam)
- Test material form:
- other: liquid
- Details on test material:
- CAS : 8046-19-3 EINECS : 232-458-4
- Name of test material (as cited in study report): STYRAX RESINOID OIL
- Test Facility test item number CRL: 208399/B
- Appearance: Orange viscous liquid
- Substance type: pure substance
- Physical state: liquid
- Analytical purity: 100%
Constituent 1
Results and discussion
Melting / freezing point
- Key result
- Melting / freezing pt.:
- >= -40.3 - <= -37.8 °C
- Atm. press.:
- 1 013.25 hPa
- Remarks on result:
- other:
- Remarks:
- Glass transition: in the range of - 40.3° C to -37.8°C (235.4K – 232.8K).
Any other information on results incl. tables
1.1.1.
The TGA curve of the test item is shown inFigure 1. Starting at 250°C, the weight of the sample decreased significantly. At 326°C, the sample weight had decreased by 25%.
After the experiment, a dark brown molten residue remained in the sample container (original colour: orange). The change of the colour indicated reaction and/or decomposition of the test item.
1.1.2.
The DSC curve obtained with Experiment 1 is shown inFigure 2. During cooling a glass transition was observed between-20°C and -60°C. During heating aglass transition was observed between -50°C and 0°C. The inflection point was -40.330°C. From 100°C an exothermic effect was observed. The exothermic effect was probably obtained due to reaction and/or decomposition of the test item.
After the experiment, a dark brown molten residue remained in the sample container (original colour: orange). The change of the colour indicated reaction and/or decomposition of the test item.
Experiment 2 was performed as a duplicate of Experiment 1. Figure 3shows the DSC curve obtained. Similar results as in Experiment 1 were obtained. The inflection point of the glass tranisition was -37.818°C. After the experiment, a dark brown molten residue remained in the sample container.
The difference in the inflection point between Experiment 1 and Experiment 2 was > 0.5°C. Therefore Experiment 3 was performed applying an identical temperature program. Figure 4shows the DSC-curve obtained. The inflection point of the glass transition was -38.453°C. As this value was in line with the inflection points observed in Experiment 1 and Experiment 2, results were accepted and it was decided to report the temperature range as observed in all three experiments. After the experiment, a dark brown molten residue remained in the sample container.
The inflection point of the glass transition point was reported as the range obtained from Experiment 1 (-40.330°C), Experiment 2 (-37.818°C) and Experiment 3 (-38.453°C).
Applicant's summary and conclusion
- Conclusions:
- The melting temperature of Styrax resinoid oil was determined by DSC. No melting point was determined for Styrax resinoid oil. A glass transition of the test item was observed at - 40.3°C to -37.8°C (235.4K – 232.9K).
- Executive summary:
No melting point was determined for Styrax resinoid oil. A glass transition of the test item was observed at - 40.3°C to -37.8°C (235.4K – 232.9 K) following the guidelines EC A.1, OECD 102 and OPPTS 830.7200.
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