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Diss Factsheets

Physical & Chemical properties

Melting point / freezing point

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Administrative data

Link to relevant study record(s)

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Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
11/1999 - 01/2000
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study without detailed documentation
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
not specified
GLP compliance:
yes
Type of method:
thermal analysis
Remarks:
(DTA, ISTA)
Decomposition:
yes
Decomp. temp.:
100 °C

- There is no melting point and no boiling point up to the decomposition of the test substance

- Pressure is not reported, but atmospheric pressure can be assumed.

Conclusions:
There is no melting point up to the decomposition of the test substance at 100°C (EU method A1).
Executive summary:

The melting point of the substance was tested according to EU method A1. The sample is closed up in a crucible made of glass for each run. First run (DTA): the sample is heated up in steps of 5 K and hold at each temperature for 25 minutes. In comparison with an inert sample (empty crucible) the temperature difference and the heat effect is recorded. Any thermal effect corresponds to a baseline deviation. Exothermal decomposition of Imidoxim starts at 100 °C.

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Melting / freezing pt.:
136 °C
Remarks on result:
other: Palazzo, 1961
Melting / freezing pt.:
154 - 155 °C
Remarks on result:
other: Aroyan, 1965
Conclusions:
Various authors have reported melting points in a range of 136-155 °C.
Executive summary:

Various authors have reported melting points in a range of 136-155 °C for Imidoxim.

Description of key information

There is no melting point up to the decomposition of the test substance at 100 °C (EU method A1).

Various authors have reported melting points in a range of 136-155 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
100 °C

Additional information

- Should read > 100°C

- Pressure is not reported, but atmospheric pressure can be assumed