Registration Dossier
Registration Dossier
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EC number: 952-026-5 | CAS number: -
Long-term toxicity to fish
Administrative data
Link to relevant study record(s)
- Endpoint:
- adult fish: sub(lethal) effects
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- other:
- Reason / purpose for cross-reference:
- data waiving: supporting information
- Reason / purpose for cross-reference:
- data waiving: supporting information
- Reason / purpose for cross-reference:
- data waiving: supporting information
- Reason / purpose for cross-reference:
- data waiving: supporting information
Reference
Description of key information
A long-term toxicity study to rainbow trout has not been carried out on Synthetic Wollastonite or the read-across material Soda-ash flux calcined kieselghur.
According to Annex IX, section 9.1.6, column 2 of Regulation (EC) No. 1907/2006, long term toxicity testing shall be proposed by the registrant if the chemical safety assessment indicates the need to investigate further the effects on aquatic organisms.
A study has not been conducted on Synthetic wollastonite as the substance is considered to have no or very low toxicity based on a number of studies.
Testing was carried out on the read-across material Kieselguhr soda ash flux calcined at 3 trophic levels (algae, daphnia and fish) in reliable OECD guideline studies. In each study the L(E)C50s were greater than the solubility of the substance (ie 100% v/v saturated solution).
Finally, Synthetic wollastonite is poorly soluble in water and consists of amorphous and crystalline silica which naturally occur in water bodies. Long-term toxic effects are not expected and therefore the study is considered to be scientifically unjustified.
Key value for chemical safety assessment
Additional information
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