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Ecotoxicological information

Long-term toxicity to aquatic invertebrates

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Link to relevant study record(s)

Description of key information

The most reliable long-term aquatic toxicity data for fresh water aquatic invertebrates is the study of Kimball, G. 1978.The lowest reported long-term data point is a 28-day NOEC of 12 mg/l for reproduction  effects in Daphnia magna .
The available data for long-term toxicity to aquatic marine invertebrates are limited and to obtaine the value for PNECs for saltwaters is taken account a assesment factor 10 to extrapolate to EC10/LC10 or NOEC following the “Guidance on Information Requirement and Chemical Safety Assessment R.10: Characterisation of dose [concentration]- response for environment”and “Table R.10-5 Assessment factors proposed for deriving PNEC water for saltwater for different data sets”, to account for the possibility that greater taxonomic diversity in the marine environment makes it likely that some marine taxa may be more sensitive than the most sensitive freshwater taxa.
The lack of reliable long-term saltwater toxicity data means that an annual average concentration must currently be based upon the freshwater NOEC (Daphnia magna of 1.89 mg/l with an assessment factor of 10). NOEC for marine water intertebrates will be 0.189 mg/l.

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Effect concentration:
12 mg/L

Marine water invertebrates

Marine water invertebrates
Effect concentration:
1.2 mg/L

Additional information

 

Under the conditions of the study of  Kimball, G. 1978 and aquatic test № 132325 and 132323 aluminium sulphate induced no reproduction effects in Daphnia magna below 12 mg/l (NOEC) and no mortality effects below 2.04 mg/l (NOEC). The 28d-LC50 was 10.2 mg/l. (See attached documents- AQUATIC TEST №: 132325 and 132323)