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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

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Diss Factsheets

Physical & Chemical properties

Melting point / freezing point

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Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2011-08-18
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
comparable to guideline study with acceptable restrictions
Qualifier:
according to guideline
Guideline:
other: ISO 1392 Determination of crystallizing point - General method
Deviations:
no
Principles of method if other than guideline:
The substance is cooled down in a solidification tube, diameter 18-25 mm. During the solidification the temperature rises due to the heat of crystallisation. The maximum temperature reached during the solidification process corresponds to the solidification point.
GLP compliance:
no
Remarks:
The study was conducted under supervision of a quality assurance unit which had ensured e.g instrumentation validation, reagent/materials certification, analyst certification and providing standard operating procedures.
Type of method:
other: Thermometry
Key result
Melting / freezing pt.:
< -20 °C
Decomposition:
no
Sublimation:
no
Remarks on result:
other: Solidification point
Conclusions:
The freezing point of the test substance was determined to be < - 20 °C.
Executive summary:

A thermometric measurement according to ISO 1392 was done to establish the solidification/freezing point of the test substance. Approx. 10 g of the substance are transferred into a solidification tube and melted if necessary, so that the tube is filled up to 1/3. The liquefied material is super-cooled to approx. 5 °C below the expected solidification point. By stirring with the thermometer and rubbing against the test tube wall the crystallisation is initiated. If necessary the liquefied material is inoculated with a crystal of the substance to be determined. The solidification/freezing point was the maximum temperature observed during the solidifying process. The freezing point of the test substance was determined to be < - 20 °C.

Endpoint:
melting point/freezing point
Data waiving:
other justification
Justification for data waiving:
other:

Description of key information

The freezing point of the test substance was determined to be < - 20 °C. In accordance with column 2 Annex VII section 7.2 of Regulation (EC) No 1907/2006 (REACH), no further test on melting point needs to be conducted as the melting point of the substance is below - 20°C.

Key value for chemical safety assessment

Additional information

A thermometric measurement according to ISO 1392 was done to establish the solidification/freezing point of the test substance. Approx. 10 g of the substance are transferred into a solidification tube and melted if necessary, so that the tube is filled up to 1/3. The liquefied material is super-cooled to approx. 5 °C below the expected solidification point. By stirring with the thermometer and rubbing against the test tube wall the crystallisation is initiated. The solidification/freezing point was the maximum temperature observed during the solidifying process. The freezing point of the test substance was determined to be < - 20 °C.