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EC number: 233-135-0 | CAS number: 10043-01-3
Short-term toxicity to fish
Administrative data
Link to relevant study record(s)
Description of key information
The lowest reliable short-term fish studies for Pimephales promelas which are reported by Kimball, G.1978, after a 192-hours exposure to aluminium sulphate induced no mortality effects below 24.4 mg/l (NOEC). One LC50 was 122.17 mg/l expressed as aluminium sulphate.
This information will be take into account for acute fish toxicity for the derivation of PNEC.
The available data for saltwater fishes are limited and to obtaine the value for PNECs for saltwaters is taken account a assesment factor10 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 short-term saltwater toxicity data means that an annual average concentration must currently be based upon the freshwater LC50 (Pimephales promelas of 122.17 mg/l with an assessment factor of 10). LC50 for marine water intertebrates will be 12.2 mg/l.
This information will be take into account for acute fish toxicity for the derivation of PNEC.
Key value for chemical safety assessment
Fresh water fish
Fresh water fish
- Effect concentration:
- 122.17 mg/L
Marine water fish
Marine water fish
- Effect concentration:
- 12.2 mg/L
Additional information
When released into water, the aluminum sulphate hydrolyses to form aluminum hydroxides and
not classified based on rapid hydrolysis and precipitation.
Hydrolysis is a chemical reaction during which molecules of water (H2O) are split into hydrogen cations (H+, conventionally referred to as protons) and hydroxide anions (OH−) in the process of a chemical mechanism).
Reactions between aluminum sulphate, water and associated “impurities” result in the formation of a floc, which separates from the water phase to form alum sludge. A small fraction of the aluminum can stay in the water in either colloidal or dissolved form.The different reactions involved in the formation of aluminum hydroxide in aqueous solution was described; the overall reaction can be represented by the following equation:
Al2(SO4)3+ 6H2O<=>2Al(OH)30+ 3H2SO4
The lowest reliable short-term fish studies for Pimephales promelas which are reported by Kimball, G.1978, after a 192-hours exposure to aluminium sulphate induced no mortality effects below 24.4 mg/l (NOEC). One LC50 was 122.17 mg/l expressed as aluminium sulphate.
This information will be take into account for acute fish toxicity for the derivation of PNEC.
The available data for saltwater fishes are limited and to obtaine the value for PNECs for saltwaters is taken account a assesment factor10 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 short-term saltwater toxicity data means that an annual average concentration must currently be based upon the freshwater LC50 (Pimephales promelas of 122.17 mg/l with an assessment factor of 10).
LC50 for marine water intertebrates will be 12.2 mg/l.
This information will be take into account for acute fish toxicity for the derivation of PNEC.
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