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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Toxicity to aquatic algae and cyanobacteria

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Administrative data

Link to relevant study record(s)

Description of key information

The no obsered effect concentraion (NOEC) for 2-Naphthalenol, 1-[[4-(phenylazo)phenyl]azo]-, ar',ar''-Me derivs for Pseudokirchneriella subcapitata at 72 hours is estimated to be 10.95 mg/L. based on this value it can be concluded that 2-Naphthalenol, 1-[[4-(phenylazo)phenyl]azo]-, ar',ar''-Me derivs is not toxic to aquatic environment based the criteria given by CLP regulation.

Key value for chemical safety assessment

EC10 or NOEC for freshwater algae:
10.95 mg/L

Additional information