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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:
28 September 2010 to 25 November 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP Compliant, guideline study, available as unpublished report, acceptable with restrictions
Reference:
Composition 1
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to
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. certificate)
Type of method:
other: method details not known but value taken from a peer-reviewed handbook
Test material information:
Composition 1
Decomposition:
yes
Decomp. temp.:
204 °C

Thermal Event Temperature (°C)
Determination 1 Determination 2
Approximate onset of exotherm 203.7 204.42
Extrapolated onset of exotherm 250.89 249.34
Exotherm peak temperature 256.3 254.42

As a result of the low rate of enthalpy change during decomposition, the onset temperature can only be approximated. Similar thermographic profiles were obtained using air and nitrogen atmospheres; this indicates that the observed decomposition is probably thermal and not oxidative

Conclusions:
Palladium (II) acetate decomposed from approximately 204 °C with no definitive signs of melting below 450°C.
Executive summary:

This is a GLP compliant, guideline study which is considered suitable for use as the key study for this endpoint. Palladium (II) acetate decomposed from approximately 204 °C with no definitive signs of melting below 450°C.

Description of key information

Palladium (II) acetate decomposed from approximately 204°C with no definitive signs of melting below 450°C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
450 °C

Additional information

O’Connor and Woolley (2011) is a GLP compliant study following OECD TG 102, which is considered suitable for use as the key study for this endpoint. Palladium (II) acetate decomposed from approximately 204 °C with no definitive signs of melting below 450°C.

The CRC Handbook (Lide, 2008) is a reliable peer reviewed handbook and so can be considered reliable and suitable for use as a supporting study for this endpoint. The melting point of Palladium (II) acetate is 205°C.