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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

The inhibition of the degradation activity of activated sludge is not anticipated when introduced in appropriate low concentrations. 
EC20 (30 min) of approximately 810 mg/L (nominal) for activated sludge (OECD 209)

Key value for chemical safety assessment

Additional information

Since no data of the toxicity on microorganisms for the described pigment are available, a read-across to a similar pigment (CAS 30125-47-4) is used to cover this endpoint. In a GLP guideline study according to OECD 209 with domestic activated sludge as inoculum changes in the respiration rate were investigated. After 30 minutes incubation time an EC20 of approximately 810 mg/L (EC50 > 1000 mg/L) was determined [Ecology and Environmental Analytics, BASF AG, 1998].