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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)

Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2010-03-23 to 2010-04-30
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP guideline study.
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
, 2008
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Remarks:
signed 2009-11-26
Type of method:
thermal analysis
Remarks:
DSC
Melting / freezing pt.:
> 450 °C
Remarks on result:
other: No significant thermal events were obtained during Determination 1 (atmosphere: air (static)) and Determination 2 (atmosphere: nitrogen). Residue: beige powder
Conclusions:
The melting temperature of the test item has been determined to be greater than 450 °C (>723 K).

Description of key information

Melting point: > 450 °C (study result, EU A.1 method)

Key value for chemical safety assessment

Additional information

In a standard test, the melting point for calcium dihydroxide (92.1 % purity) was determined to be > 450°C. Literature data for calcium carbonate also show the melting point to be greater than 450°C. In a Thermogravimetric analysis study, a sample of hydrated lime (calcium dihydroxide content of 91.3 %) was found to begin decomposition at 360 °C and to melt at 510 °C, whilst a sample with calcium dihydroxide of 60.0 % and calcium carbonate content of 35.9 %, respectively, showed decomposition at 356 °C and 571 °C with melting at approximately 490 °C and approximately 800 °C.