Registration Dossier
Registration Dossier
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EC number: 271-794-6 | CAS number: 68608-66-2
Boiling point
Administrative data
Link to relevant study record(s)
- Endpoint:
- boiling point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- August 17, 2011 - January 10, 2012
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 103 (Boiling point/boiling range)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.2 (Boiling Temperature)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Remarks:
- (DSC)
- Key result
- Atm. press.:
- 1 013.25 hPa
- Decomposition:
- yes
- Decomp. temp.:
- >= 75 °C
- Remarks on result:
- other: Reaction and/or decomposition of the test substance was observed starting at a temperature of 75°C (348K). Boiling of the test substance was not observed below the temperature at which reaction and/or decomposition started.
- Conclusions:
- The boiling temperature of the substance was determined using DSC, in accordance with OECD 103, EU Method A.2 and GLP. Evaporation of water and reaction and/or decomposition of the test substance was observed starting at 75°C (348K). Boiling of the test substance was not observed below the temperature at which reaction and/or decomposition started. Based on this, the test substance has no boiling temperature.
Reference
Preliminary test
From 300°C upwards the weight of the sample decreased significantly. At 365°C the sample weight had decreased by 25%. After the experiment, a black molten residue remained in the sample container (original colour: light yellow). The change of the colour indicated reaction and/or decomposition of the test substance.
Main study (experiment #1)
An endothermic peak between 25°C and 75°C was observed. The extrapolated onset temperature of the peak could not be determined, because the effect appeared directly from the start of the experiment. The effect was most likely obtained due to melting of the test substance. At temperatures >75°C, effects were observed which were due to evaporation of water and/or other volatile components and reaction/decomposition. After the experiment, a brown coagulated residue remained in the sample container. The change of the colour indicated reaction and/or decomposition of the test substance.
Main study (experiment #2)
An endothermic peak between 25°C and 75°C was observed. The extrapolated onset temperature of the peak was 39.99°C. The effect was most likely obtained due to melting of the test substance. From 75°C effects were observed which were due to evaporation of water and/or other volatile components and reaction/decomposition. After the experiment, a brown coagulated residue remained in the sample container. The change of the colour indicated reaction and/or decomposition of the test substance.
Main study (experiment #3)
To investigate the melting peak between 25°C and 75°C the third experiment was stopped directly after the effect. The extrapolated onset temperature of the melting peak was 39.18°C. After the experiment, a coagulated residue remained in the sample container.
Main study (experiment #4)
To investigate the endothermic peak, a lower heating rate of 5°C/minute was applied in the fourth experiment. The extrapolated onset temperature of the melting peak was 35.97°C. This difference in onset temperature with respect to those obtained at a heating rate of 20°C/minute is caused by a difference in slope of the endothermic peak. The start temperature of the endothermic effect, however, is equal at both heating rates. After the experiment, a coagulated residue remained in the sample container. No colour change was observed. Therefore, this peak was considered as the melting peak. The average melting temperature was based on the experiments with a heating rate of 20°C/minute.
Description of key information
The substance has no boiling temperature. Reaction and/or decomposition of the substance was observed starting at a temperature of 75°C
Key value for chemical safety assessment
Additional information
The boiling temperature of the substance was determined using DSC, in accordance with OECD 103, EU Method A.2 and GLP
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