Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
no data: aquatic toxicity unlikely

Marine water

Hazard assessment conclusion:
no data: aquatic toxicity unlikely

Hazard for air

Hazard for terrestrial organisms

Hazard for predators

Additional information

In accordance with the ECHA Guidance R.10 (May 2008), the derivation of PNECs is required for the chemical safety assessment (CSA) of substances manufactured/imported/used in quantities from 10 t/a onwards. Thus, no PNECs have been derived for the REACH registration of Zirconium disilicide in the tonnage band 1-10 t/a (REACH Annex VII).

Conclusion on classification

The water solubility of the substance analysed under the conditions of the T/D test (OECD Series on Testing and Assessment No. 29) was below the detection limit (method detection limit 0.04 µg/mL). Based on the results, Zirconium disilicide can be considered as highly insoluble in water. Thus, aquatic toxicity is unlikely to occur and no classification is warranted.