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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Description of key information

Red disazo condensation pigments are with high probability acutely not harmful to aquatic invertebrates. 
No toxic effects occur at the range of the substances solubility.
EC50 (48h) > 100 mg/L (nominal) for Daphnia magna (OECD 202)

Key value for chemical safety assessment

Additional information

The acute toxicity on aquatic invertebrates was investigated for two ‘red disazo condensation pigments’(CAS 40618-31-3 and CAS 52238-92-3) with the waterflea Daphnia magna, in GLP guideline studies according to OECD 202 [DR.U.NOACK-LABORATORIEN, 2004]. Based on the low water solubility of the test item, saturated stock solutions were prepared and the tests were conducted as limit tests with a nominal concentration of 100 mg/L. For both substances no effects on the swimming mobility of daphnia within the range of solubility are observed after 48 hours of exposure.