Registration Dossier

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

This substance is not expected to bioaccumulate in the form in which it is made available.

Additional information

The substance is an inorganic solid structurally related to naturally occurring hectorite that is insoluble in water and n-octanol.

The amount of soluble free Na, Mg, Li, F and Si that would be made available will not contribute to the background levels of these ions already present in the environments. Bioaccumulation in aquatic/sediment organisms will not occur in excess of exposure to naturally occurring sediments.

Besides, as the substance is poorly soluble (disperses in water to form a colloidal suspension), low concentrations are expected in the aquatic compartment. Low quantities which might be taken up are considered to be not bioavailable as it is known that based on the lack of hydrolysis, no toxicologically relevant absorption of Na, Mg, Li or F should occur, and with regard to Si, if there was any absorbed, Si levels are known to be rapidly excreted in urine and faeces. Thus, the substance contains no bioaccumulation potential.

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