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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Additional information

Experimental short term toxicity studies are waived because of highly insolubility of anthraquinone in water (In accordance with REACH Regulation (EC) No 1907/2006, Annex VII and Annex VIII, the studies do not need to be conducted if the substance is highly insoluble in water. Seeing that the solubility is 74.6 micrograms per liter, substance meets the criteria for insolubility.) The long-term aquatic toxicity studies are considered (testing proposal).

There are five acute toxicity studies available (three for fish, one acute toxicity study to freshwater invertebrates and one for marine organisms) with reliable results and where selection of the test concentrations was based on the limit of water solubility of Anthraquinone. Based on these data, it was established that under the conditions maintained during the studies Anthraquinone is not acutely toxic to fish, daphnids and eastern oysters at and below the material's limit of water solubility.

No reliable standard microbial inhibition test data are available. Results of toxicity study of anthraquinone to microorganisms are above water solubility, thus the test result has to be considered as unreliable.

Estimation of PNECs value is therefore impossible, and also the estimated L(E)C50 can only be used as an indication of the short-term toxicity of the chemical considered.

The chemical safety assessment according to Annex I of REACH indicates the need to investigate further the effects on aquatic organisms, due to low water solubility of a substance, long-term tests should be performed.