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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Link to relevant study record(s)

Reference
Endpoint:
vapour pressure
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
the study does not need to be conducted because the melting point is above 300°C
Justification for type of information:
JUSTIFICATION FOR DATA WAIVING
In accordance with column 2 of Annex VII (required in Section 7.8) of REACH Regulation 1907/2006 the study does not need to be conducted if the melting point is above 300ºC. Based on the results of a study carried out on an analogue substance, the melting point of Synthetic Wollastonite was determined to be > 723 K (equivalent to > 450 ºC. This is consistent with the melting point of silicas and silicates which have melting temperatures higher than 300°C.
Reason / purpose for cross-reference:
data waiving: supporting information
Reason / purpose for cross-reference:
data waiving: supporting information

Description of key information

A vapour pressure study is not considered necessary for Synthetic Wollastonite based on melting point data available on the read-across substances Soda-ash flux calcined kieselghur and silicic acid, calcium salt.

Key value for chemical safety assessment

Additional information

In accordance with column 2 of Annex VII (required in Section 7.8) of REACH Regulation 1907/2006 the study does not need to be conducted if the melting point is above 300ºC. Based on the results of a study carried out on an analogue substance, the melting point of Synthetic Wollastonite was determined to be > 723 K (equivalent to > 450 ºC. This is consistent with the melting point of silicas and silicates which have melting temperatures higher than 300°C.