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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
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP Compliant, guideline study, available as unpublished report, acceptable with restrictions
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
Principles of method if other than guideline:
Differential scanning calorimetry (DSC) using the procedure specified in ASTM E537-86
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Melting / freezing pt.:
ca. 103 °C
Decomposition:
yes
Tris(triphenylphosphine) rhodium (I) chloride was determined to decompose from approximately 376 K (103 °C) on heating. As the test item decomposed, no value for the melting/freezing temperature could be determined experimentally. Visual assessment performed using a metal block apparatus confirmed that the test item melted completely during the decomposition process and a black liquid with no remaining solid was observed at a temperature of 154 °C (427 K).
Conclusions:
Tris(triphenylphosphine) rhodium (I) chloride was determined to decompose from approximately 376 K (103 °C) on heating.

As the test item decomposed, no value for the melting/freezing temperature could be determined experimentally. Visual assessment performed using a metal block apparatus confirmed that the test item melted completely during the decomposition process and a black liquid with no remaining solid was observed at a temperature of 154 °C (427 K).
Executive summary:

This is a GLP compliant, guideline study which is considered suitable for use as the key study for this endpoint.

Tris(triphenylphosphine) rhodium (I) chloride was determined to decompose from approximately 376 K (103 °C) on heating. As the test item decomposed, no value for the melting/freezing temperature could be determined experimentally. Visual assessment performed using a metal block apparatus confirmed that the test item melted completely during the decomposition process and a black liquid with no remaining solid was observed at a temperature of 154 °C (427 K).

Description of key information

Tris(triphenylphosphine) rhodium (I) chloride decomposes from approximately 103°C (376 K) on heating.

Key value for chemical safety assessment

Additional information

O'Connor & Woolley (2011) is a GLP compliant study following OECD TG 102 and is considered reliable and suitable for use as the key study for this endpoint.

Tris(triphenylphosphine) rhodium (I) chloride was determined to decompose from approximately 103°C (376 K) on heating. As the test item decomposed, no value for the melting/freezing temperature could be determined experimentally. Visual assessment performed using a metal block apparatus confirmed that the test item melted completely during the decomposition process and a black liquid with no remaining solid was observed at a temperature of 154 °C (427 K).