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Ecotoxicological information

Long-term toxicity to aquatic invertebrates

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Description of key information

NOEC 21d Daphnia = 6.59 mg/l

Key value for chemical safety assessment

EC10, LC10 or NOEC for freshwater invertebrates:
6.59 mg/L

Additional information

A Daphnia magna reproductive study is available on CAS 16470-24-9 with NOEC reported as geometric mean because the difference between nominal and measured values is often greater than ± 20 %. The test was performed on a similar substance within the category of Stilbene Fluorescent Whitening Agents, the analogous dihydroxyethyl derivative tetrasulphonated sodium salt.

This substance can be considered a conservative representative, since it has the similar organic functionalities, but the higher sulphonation let to a higher water solubility, therefore availability in the water compartment. The percentage and chemical identity of organic impurities are also very similar. The category Justification Report is attached to section 13.