Registration Dossier
Registration Dossier
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EC number: 294-436-0 | CAS number: 91722-33-7 A complex combination of organic compounds separated after condensation of the vapors from the destructive distillation of wood.
Melting point / freezing point
Administrative data
Link to relevant study record(s)
Description of key information
The mean between two determinations gives the following values for the melting range of tar, wood:
Melting range: - 32.9 °C to - 22.0 °C (240.3 – 251.2 K)
Standard deviation: 0.1 °C (begin); 0.3 °C (end)
Estimated accuracy: ± 0.4 °C
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- -27.5 °C
Additional information
This study was performed in order to determine the melting point or the melting range of
the test item Tar wood.
The melting point is one of the fundamental physico-chemical properties of a chemical
substance. The test item was heated with a defined heating rate until melting / decomposition
of the test item could be observed. The start temperature was determined in a pretest.
The validity criterion “difference between duplicate determinations” was met. The test item
Tar wood showed a melting range, no melting point. This was to be expected, as the test
item is a mixture.
No observations were made which might cause doubts on the validity of the study outcome.
Therefore, the result of the study is considered valid.
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