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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Vapour pressure

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Description of key information

In accordance with a Column 2 adaption of REACH Annex VII section 7.5., this study does not need to be conducted as the melting point of tantalum is above 300 °C.

Key value for chemical safety assessment

Vapour pressure:
0 Pa
at the temperature of:
25 °C

Additional information

In accordance with the column 2 adaptation statement of REACH Annex VII, experimental determination of the vapour pressure is not required as the melting point of the substance is above 300 °C. A representative value as recommended by the Guidance on Information Requirements and Chemical Safety Assessment Appendix R.7.13-2: Environmental risk assessment for metals and metal compounds of 1.0 × 10–6 Pa has been taken forward for risk assessment purposes.