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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Acute experimental studies are available, at the time being, to assess the aquatic toxicity of the registered substance, Solvent Green 28 (CAS No 4851-50-7).

A category approach has been defined (see attached justification document in section 13). The category consists of substances all having the diamino-anthraquinone structure as a common moiety which is linked to phenyl groups via the amino groups. Differences within the category are described by various alkyl groups bound to the phenyl groups. All substances included in the category approach are poorly water soluble with high adsorption coefficient (log Koc>6), high partition coefficient (logKow>8) and not readily biodegradable. These properties lead to a reduced bioavailability for organisms.

Within the category, no toxic effects were observed up to the highest attainable limit of solubility of the substances in experimental acute studies for the three trophic levels (fish, aquatic invertebrates and algae). However, due to the poorly water solubility and the very adsorptive behavior of the substances, the available experimental short-term toxicity studies cannot be used to establish a trend for the aquatic toxicity of the substances. These short-term tests do not give a true measure of toxicity for this type of substance and the long-term toxicity tests are required. To fulfill these chronic endpoints, HA-QSAR predictions, experimental studies and testing plans for long-term exposure are available/requested. Based on available information at the time being, no toxic effects were estimated or observed up to the highest attainable limit of solubility of the registered substance, Solvent Green 28, and all members of the category approach, in chronic exposure too. 

The registered substance, Solvent Green 28, is not expected to be hazardous to pelagic organisms. 

Regarding toxicity to microorganisms, an OECD TG 209 study will be performed on the registered substance, Solvent Green 28, to support the category approach. However, based on the available experimental studies performed on the source substances, members of the category, no significant effect on the respiration rate of activated sewage sludge are expected at the limit of water solubility of the substance, neither at concentrations in excess. 


Three news studies are planned on the registered substance (OECD TG 209, 210 and 211 studies). The dossier will be updated with the new studies as soon at it become available.

Additional information