Registration Dossier

Diss Factsheets

Physical & Chemical properties

Melting point / freezing point

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
, adopted 1995
Deviations:
no
GLP compliance:
no
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
> 650 °C
Atm. press.:
1 013 hPa
Decomposition:
yes
Decomp. temp.:
>= 650 °C
Remarks on result:
other: No melting point was determined prior to the decomposition and/or sublimation of the test item , starting at approx. 650°C
Conclusions:
No melting point was determined prior to the decomposition and/or sublimation of the test item, starting at approx. 650°C.
Executive summary:

The DSC measurement was combined with a thermogravimetric (TG) measurement according to OECD Test Guideline 102 [adopted on 27 July 1995] and EU test method A.1 “Melting/freezing temperature“, Council Regulation (EC) No 440/2008 of 30 May 2008.

The heat flow curve shows a very small endothermic peak at 228°C (226°C extrapolated onset), which corresponds to the melting point of tin (230°C). Upon further heating a larger endothermic effect is registered starting at 747°C, with a peak maximum temperature at 858°C. Simultaneously to the endothermic heat flow, however, a significant mass loss is observed. After cooling down, the sample holder, the reference crucible as well as the sample crucible are covered with a grey precipitation (sample crucible inside and outside). Therefore the endothermic peak cannot be related to melting, but to decomposition and/or sublimation. 

Description of key information

No melting point was determined prior to the decomposition and/or sublimation of the test item, starting at approx. 650°C.

Key value for chemical safety assessment

Additional information

No melting point was determined prior to the decomposition and/or sublimation of the test item, starting at approx. 650°C.

Categories Display