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EC number: 500-233-2 | CAS number: 68891-29-2 1 - 2.5 moles ethoxylated
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:
- 18 Aug-3 Sep 2012
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- GLP compliance:
- no
- Type of method:
- differential scanning calorimetry
- Melting / freezing pt.:
- > 172 °C
- Decomposition:
- yes
- Decomp. temp.:
- ca. 172 °C
Reference
Details:
The test item shows no melting of a crystalline main component up to 172 °C (mean value of the repeat determination in the 1. - 4. heating run) according to the definition in the OECD Guideline 102. Up to 172 °C the sample shows a weight loss of ca. 6 weight %. From 172 °C the test item shows most probably a thermal decomposition with melting and evaporation of the decomposition components. A vaporization of significant parts of the test item cannot be completely excluded.
176 °C (from first measurement)
171 °C (from second measurement)
170 °C (from third measurement)
In the temperature range between about -60 °C and -15 °C the test item shows a melting area of a crystalline sub component. Between about 103 °C and 120 °C the test item shows a non-reversible endothermic effect, probably an evaporation of a sub component.
The cooling runs show no crystallisation of main component. The first cooling run shows a crystallization of a sub component at -31 °C.
The DSC measurements were confirmed by means of TGA measurements (up to 172 °C the sample shows a weight loss of ca. 6 weight %) under the same measuring conditions.
Description of key information
> 172 °C.
Key value for chemical safety assessment
Additional information
The melting point of the substance was determined by Differential Scanning Calorimetry according to OECD Guideline 102.
No melting of a crystalline main component was observed up to 172 °C. From this temperature, the substance shows a thermal decomposition with melting and evaporation of the decomposition components. Between -60 °C and -15 °C the substance shows a melting area of a crystalline sub-component (crystallization of a sub-component in the cooling run at -31 °C).
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