Registration Dossier
Registration Dossier
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EC number: 701-325-7 | CAS number: -
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
No meaningful threshold levels can be identified and no toxicity is assumed for iron and aluminium. Manganese effects were assessed by SSD.
Key value for chemical safety assessment
Additional information
- Canterford GS, Canterford DR (1980) Toxicity of heavy metals to the marine diatom Ditylum brightwellii (West) Grunow: correlation between toxicity and metal speciation. Journal of the Marine Biological Association of the U.K. 60:227–42
- Fargašová A, Bumbalova A, Havranek E (1999) Ecotoxicological effects and uptake of metals (Cu+, Cu2+, Mn2+, Mo6+, Ni2+, V5+) in freshwater alga Scenedesmus quadricauda. Chemosphere 38(5):1165–73.
Iron
No valid and conclusive studies are available or can be made under laboratory conditions (see discussion on Aquatic toxicity). It is concluded that acute and chronic aquatic toxicity testing with the submission item or Fe(II) salts in general is under aerobic conditions technically not feasible and scientifically unjustified. Up to the level of its water solubility, which is almost identical to the natural background concentrations no toxicity is assumed.
Thus the threshold levels for the submission item need to derived from effects of the remaining relevant major components, aluminium and manganese.
Manganese
The most sensitive species seem to be a marine diatom (Ditylum brightwellii), with a 5-day EC50, based on growth, of 1.5 mg manganese per L (tested as dichloride, Canterford & Canterford 1980), and a freshwater alga (Scenedesmus quadricauda) with a 12-day EC50, based on chlorophyll inhibition, of 1.9 mg manganese per L (tested as sulphate, Fargašová et al 1999).
The hazard to the aquatic life is assessed on the basis of a Species Sensitivity Distribution (SSD) calculation (see discussion on Aquatic toxicity).
Aluminium
No valid and conclusive studies are available or can be made under laboratory conditions (see discussion on Aquatic toxicity).
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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