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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

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other: GLP Compliant, guideline study, available as unpublished report, acceptable with restrictions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:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
> 450 °C

Test item supplied as hydrated solid. It did not change in appearance over the course of the testing. Authors concluded that the wide endotherm observed at approximately 25 to 120 °C was most likely due to losses of water of crystallisation. Melting temperature point of Platinum dioxide (hydrated solid) has been determined to be greater than 450 °C.

Conclusions:
The melting temperature of platinum dioxide (hydrated solid) has been determined to be greater than 450 °C.
Executive summary:

This is a GLP compliant, guideline study which is considered suitable for use as the key study for this endpoint. The melting temperature of platinum dioxide (hydrated solid) has been determined to be greater than 450 °C.

Description of key information

The melting temperature of platinum dioxide (hydrated solid) has been determined to be greater than 450 °C.

Key value for chemical safety assessment

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

Additional information

Walker and White (2011) is a GLP compliant study following OECD TG 102, which is considered suitable for use as the key study for this endpoint. The melting temperature of platinum dioxide (hydrated solid) has been determined to be greater than 450 °C.
The CRC Handbook (Lide, 2008) is a reliable peer reviewed handbook and can be considered reliable and suitable for use as the supporting study for this endpoint. The reported melting point of platinum dioxide was 450 °C at 101.325 kPa