Registration Dossier
Registration Dossier
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EC number: 800-984-9 | CAS number: 1428547-35-6
Endpoint summary
Administrative data
Description of key information
The registered substance is a salt composed of a primary alkyl amine and a fatty acid. Both elements present a long hydrogenated (saturated) carbon chains (16 to 18 carbon atoms) that lead to the form of the substance which is a waxy solid block. In test freshwater, the salt partially solubilize (100 -600 µg/L as a maximum achievable dissolution of the test item in the OECD 210 TG study). At this level, fatty acids are not toxic. The toxicity is due to the mix of cationic alkylamine moieties. As a consequence, it was justified to proceed to a read-across from the primary fatty amines. Data generated for equivalent chain length fatty amine can thus be used as a conservative estimate for aquatic toxicity for this salt. If a part of the salt is released from the block, it will lead to dissolution in water of the solid: the positive and negative ions will be separated by the water shell around these ions. Primary alkyl amines are strong bases with a pKa of ca. 10.6 which means that they are protonated to 99.975% under environmental conditions e.g. pH 7. To conclude, the ecotoxicity of the salt in aqueous solutions will not be related to stearate and thus the available data of the primary alkyl amine can be used for the salt. In the end, three short-term and three long-term toxicity results are available for three trophic levels.
Additional information
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