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Physical & Chemical properties

Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Testing was conducted between 31 August 2005 and 18 October 2005.
Reliability:
1 (reliable without restriction)
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
differential scanning calorimetry
Specific details on test material used for the study:
Sponsor's identification: FSM-005W
Description: white solid
Batch number: 2005-01
Date received: 23 August 2005
Storage conditions: room temperature in the dark under nitrogen over silica gel
The integrity of supplied data relating to the identity, purity and stability of the test material is the responsibility of the Sponsor.
Melting / freezing pt.:
>= 476 - <= 486 K
Atm. press.:
>= 101.05 - <= 101.62 kPa
Decomposition:
yes
Remarks:
Evidence of gradual decomposition
Decomp. temp.:
>= 198 - <= 210 °C

Discussion

A nitrogen atmosphere was used since inconsistent thermograms were obtained in air, especially around the melting with gradual decomposition area.

Evidence of gradual decomposition was shown by the rising baseline in the thermograms and from a visual assessment based on a metal block technique which showed a gradual colour change from colourless to a dark amber colour from approximately 198 to 210 °C.

Conclusions:
The test material has been determined to melt with evidence of gradual decomposition at 481 ± 0.5 K at 101.05 to 101.62 kPa. As the test material decomposed, no value for boiling temperature could be determined. A calculated value of boiling temperature gave a result of 543°C
Executive summary:

Melting/Freezing Temperature and Boiling Temperature. Melted with evidence of gradual decomposition at 481 ± 0.5 K, at 101.05 to 101.62 kPa by differential scanning calorimetry, using ASTM E537-86, Methods Al and A2 of Commission Directive 92/69/EEC. No value for boiling temperature could be determined. A calculated value of boiling temperature gave a result of

543oc.

Description of key information

Melting/Freezing Temperature and Boiling Temperature. Melted with evidence of gradual decomposition at 481 ± 0.5 K, at 101.05 to 101.62 kPa by differential scanning calorimetry, using ASTM E537-86, Methods Al and A2 of Commission Directive 92/69/EEC. No value for boiling temperature could be determined. A calculated value of boiling temperature gave a result of 543oc.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
481 K

Additional information