Registration Dossier
Registration Dossier
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EC number: 947-717-3 | CAS number: -
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:
- 06 January 2017-16 March 2017
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study
- Justification for type of information:
- The study was conducted according to an internationally recognized method, and under GLP. Restrictions apply considering the difficulty of interpreting the results obtained by DSC for such complex substance and the approximation related to the initial enthalpy changes. Test substance is adequately specified. Therefore validation with restrictions applies.
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 103 (Boiling Point)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.2 (Boiling Temperature)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- date of inspection 05 Juillet 2016 / date of issue 28 October 2016
- Type of method:
- differential scanning calorimetry
- Decomposition:
- yes
- Decomp. temp.:
- >= 240 °C
- Conclusions:
- No boiling point temperature was determined as the test item was supposed to decompose (potentially from 240-250°C). However a thermal transition was observed, i.e. boiling with decomposition from ca 300 °C (573 K) at 102.2 kPa.
- Executive summary:
The boiling point of the test substance was measured under GLP according to OECD 103 / EU A2 guideline, differential scanning calorimetry method.
Aliquots of test item were placed in pierced crucibles and were subjected to a thermal program (25 to 450 °C at 20 °C/min under Air). Four determinations were performed under AIr (Patm = 102,2kPa). .
No boiling point temperature was determined as the test item was supposed to decompose from 240 -250°C (based on the deviation of the baseline), even if a thermal transition was observed, i.e. boiling with decomposition, from ca 300 °C (573 K) at 102.2 kPa.
Similar thermographic profiles were obtained using air and nitrogen atmospheres, indicating that the decomposition was probably thermal and not oxidative.
Reference
Results
Weight change for determination 1, 2, 4, 5 and 6 = 100%
Weight change for determination 3 = 93%
Determinations 5 and 6 used for decomposition analysis only.
Atmospheric pressure: Determination 1-4: 102.2 kPa
Boiled with supposed decomposition from ca 300 °C (573 K).
Thermal event |
Interpretation |
Temperature |
|||
Determination 1 |
Determination 2
|
||||
°C
|
K
|
°C
|
K
|
||
Endotherm |
Boiling with supposed decomposition |
311.52 |
584.7 |
299.96 |
573.1 |
Thermal event |
Interpretation |
Determination 3
|
Determination 4
|
||
°C
|
K
|
°C
|
K
|
||
Endotherm |
Boiling with supposed decomposition |
301.99 |
575.1 |
293.78 |
566.9 |
Discussion
After heating, a black shiny solid residue was observed, which is considered as the sign of decomposition of the substance. Considering the exothermic deviation of the baseline, the decomposition may have started at about 240-250°C. Therefore no boiling point can be determined using the DSC method and only an overall result was reported based on the thermal transition observed at approximately 300°C.
No boiling point temperature was determined as the test item decomposed. Similar thermographic profiles were obtained using air and nitrogen atmospheres. This indicated that the decomposition was probably thermal and not oxidative.
Description of key information
No boiling point temperature was determined as the test item was supposed to decompose from 240-250°C. However a thermal transition was observed, i.e. boiling with decomposition, from 300 °C (573 K) at 102.2 kPa.
Key value for chemical safety assessment
Additional information
A reliable experimental study, conducted according to a recognized OECD/EC method, the differential scanning calorimetry under GLP, is available. It is considered as a key study.
No boiling point temperature was determined as the test item was supposed to decompose before boiling. Therefore no value was retained as key value.
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