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EC number: 943-074-8 | CAS number: 1840866-81-0
Similar salts show effects to algae from 50 mg/l. It is not known if this is a genuine hazardous effect or simply slowing growth by preventing light.
From assessment of similar sulphonated azo substances, there is no indication that CJ321 need not be classified as hazardous to aquatic organisms on the basis of effects to aquatic plants. Although some references show an inhibition of growth rates biomass at concentrations below 100 mg/l, it is considered very likely that this is mainly due to absorption of light at wavelengths liked to photosynthesis.
The potassium / sodium salt resulted in effects in the range 10 – 100 mg/l and is classified Aquatic Chronic 3. This may be due to the aminosulphonyl group which is not present in the other assessed dyes, so in the absence of further data, it is recommended to classify CJ321 on this basis.
The read-across is valid and is backed up by review documents, including an assessment of azo dyes by the Danish EPA that conclude low environmental toxicity to aquatic organisms.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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