Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Adsorption / desorption

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Administrative data

Link to relevant study record(s)

adsorption / desorption: screening
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:

Description of key information

No studies are available. The test substance is an inorganic substance which is poorly soluble in water.

Key value for chemical safety assessment

Additional information

In accordance with column 2 of Annex VIII, (Section 9.3.1) of REACH Regulation 1907/2006 an adsorption/desorption screening test is required for substances with a high potential for adsorption (e.g. the substance has a high octanol water partition co-efficient).

Synthetic wollastonite is an inorganic solid for which an octanol/water partition coefficient cannot be reliably determined. The substance consists of amorphous and crystalline silica which when released into the environment are expected to combine indistinguishably with the soil or sediment due to their similarity with inorganic soil/sediment matter and will be subjected to natural processes under environmental conditions (cation exchange, dissolution, sedimentation). It is therefore considered to be essentially a mineral fraction of soil already. Additionally the test substance is poorly soluble in water and therefore it is likely to be technically unfeasible to perform the test. On this basis the study is considered to be scientifically unjustified.