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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Description of key information

Dihydrogen hexahydroxyplatinate decomposes before it melts. The decomposition temperature is ~ 145°C

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
145 °C

Additional information

Walker & White (2011) study is a GLP complaint, guideline study considered suitable for use as the key study for this endpoint. The decomposition temperature of dihydrogen hexahydroxyplatinate is approximately 145 °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 the supporting study for this endpoint. The decomposition temperature is 100 °C.