Registration Dossier
Registration Dossier
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EC number: 232-445-3 | CAS number: 8030-70-4
Endpoint summary
Administrative data
Description of key information
Aquatic toxicity studies of fatty acids, tall-oil, manganese salts are not available. In the assessment of ecotoxicological effects of Fatty acids, tall-oil, manganese salts, a read-across approach from the sub-categories manganese and fatty acids, tall-oil is applied since the soluble manganese and tallate ions released upon dissolution of Fatty acids, tall-oil, manganese salts determine its toxicity in the environment. Reliable data indicate that the moiety of ecotoxicological concern are manganese cations though manganese is an essential trace nutrient.
Whereas fatty acids, tall oil has a low potential for toxicity to aquatic organisms, manganese cations, even though essential, appear to be toxic to fish, invertebrates and algae. The lowest respective acute effect concentrations of manganese for fish, invertebrates, algae and microorganisms are as follows:
- 96-h LC50 of 3.17 mg Mn/L for Oncorhynchus mykiss
- 96-h LC50 of 3.0 mg Mn/L for Hyalella azteca
- 72-h ErC50 of 19.8 mg Mn/L for the inhibition of growth rate of Desmodesmus subspicatus
- 3-h EC50 of > 325.1 mg Mn/L for respiration inhibition of aquatic microorganisms
The lowest respective long-term (chronic) effect concentrations for fish, invertebrates, algae and microorganisms are as follows:
- 4-months NOEC/EC10 of 0.6 mg Mn/L for Oncorhynchus mykiss
- 60-d NOEC of 0.01 mg Mn/L for Macrobrachium rosenbergii (giant river prawn)
- 72-h NOErC of 0.325 mg Mn/L for the inhibition of growth rate of Desmodesmus subspicatus
- 3-h NOEC of 182 mg Mn/L for respiration inhibition of aquatic microorganisms
For marine aquatic species, the lowest identified endpoint is a NOEC of 0.02 mg Mn/L.
Acute effect concentrations of manganese conservatively recalculated for fatty acids, tall-oil, manganese salts based on a maximum manganese content of 9% are as follows:
- 96-h LC50 of 35.2 mg/L for Oncorhynchus mykiss
- 96-h LC50 of 33.3 mg/L for Hyalella azteca
- 72-h ErC50 of 220.0 mg/L for the inhibition of growth rate of Desmodesmus subspicatus
- 3-h EC50 of > 3612.2 mg/L for respiration inhibition of aquatic microorganisms
Chronic effect concentrations of manganese conservatively recalculated for fatty acids, tall-oil, manganese salts based on a maximum manganese content of 9% are as follows:
- 4-months NOEC/EC10 of 6.67 mg/L for Oncorhynchus mykiss
- 60-d NOEC of 0.11 mg/L for Macrobrachium rosenbergii (giant river prawn)
- 72-h NOErC of 3.61 mg/L for the inhibition of growth rate of Desmodesmus subspicatus
- 3-h NOEC of 2022.2 mg/L for respiration inhibition of aquatic microorganisms
For marine aquatic species, the lowest identified endpoint is a NOEC of 0.22 mg Mn/L.
Additional information
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