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Environmental fate & pathways

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Synthetic wollastonite is an inorganic substance which contains both amorphous and crystalline silica. These substances are expected to combine indistinguishably with the soil layer or sediment due to their similarity with inorganic soil matter.

Based on the chemical nature of the substance (inorganic structure and chemical stability) no degradation is expected to occur.


Soil and sediment degradation studies are not considered to be applicable as the test material is poorly soluble in water and consists of both amorphous and crystalline silica which occur naturally in these compartments.


Data on volatilisation is not available. Synthetic wollastonite is an inorganic solid and based on information on the read-across material Kieselguhr soda ash flux calcined has a high melting point (>450 °C) and therefore can be considered to be non volatile.

No risk of bioaccumulation or secondary poisoning is anticipated.