Tetraamminepalladium(2+) dichloride

Melting point / freezing point

Link to relevant study record(s)

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

4 October 2010 to 13 December 2010

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP complaint, guideline study, availalbe as unpublished report, acceptable without restrictions

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

GLP compliance:

yes (incl. QA statement)

Type of method:

other: Differential scanning calorimetry (DSC) using the procedure specified in ASTM E537-86

Decomposition:

yes

Decomp. temp.:

ca. 300 °C

Remarks on result:

other: No melting below 450 °C

There were no signs of melting in determinations 1 and 2, however the test item had changed from a pale yellow crystalline solid to a grey powder. This indicates that the broad endotherm in the approximate temperature range of 160 to 230 °C is caused by the test item losing waer of crystallisation, and hence changed form a crystalline solid to a powder, with no significant change in colour. This also indictes that the exoterms in the approximate temperature range of 300 to 350 °C in determinations 1 and 2 are due to the decomposition of the test item.

Similar thermographic profiles were obtained using air and nitrogen atmospheres; this indicates that the observed decompositionin both determinations is probably thermal and not oxidative.

Conclusions:

Tetraamminepalladium(2+) dichloride decomposed from approximately 300 °C with no definitive signs of melting below 450°C

Executive summary:

This is a GLP compliant, guideline study considered suitable for use as the key study for this endpoint. Tetraamminepalladium(2+) dichloride decomposed from approximately 300 °C with no definitive signs of melting below 450°C

Description of key information

Tetraamminepalladium(2+) dichloride decomposed from approximately 300 °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

Atwal and Tremain (2011) is a GLP compliant, guideline study considered suitable for use as the key study for this endpoint. Tetraamminepalladium(2+) dichloride decomposed from approximately 300 °C with no definitive signs of melting below 450°C.