Registration Dossier
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EC number: 270-451-8 | CAS number: 68440-34-6
Short-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
Description of key information
No effects up to the limit of water solubility
Key value for chemical safety assessment
Additional information
No studies are available on the short-term toxicity of Fatty acids, tallow, zinc salts to aquatic invertebrates. In accordance to Regulation (EC) No 1907/2006 Annex XI, 1.5, a read across to the structural analogue Fatty acids, C16-18, zinc salts (CAS No. 91051-01-3) was conducted. Based on similar structure, physico-chemical properties and zinc content, the ecotoxicological profile of the two substances is expected to be comparable. Further justification is given within the endpoint summary 6.1 and the read-across justification. The data available for Fatty acids, C16-18, zinc salts and the supporting data available for inorganic zinc substances are discussed below.
Fatty acids, C16 -18, zinc salts:
The study conducted with Fatty acids, C16 - 18, zinc salts was performed according to the OECD Guideline 202, using Daphnia magna as test organism. The highest test concentration was prepared with a 100 mg/L loading to obtain a saturated solution in the range of water solubility. Additionally, four dilutions (factor 3.2) were prepared and tested. The test was performed at pH 6 and 8. No effects were observed at the tested concentrations. The toxicity of the substance fatty acids, C16 -18, zinc salts to Daphnia magna is thus (far) above the water solubility limit.
ZINC:
Many good quality and relevant data for 5 standard species are available. Tests were done according to standard protocol or equivalent.
Data are grouped per species according to
-pH: low (6 - <7) - neutral/high (7 -8.5)
-and hardness: low/medium (< 100 mg CaCO3/L) and medium/high (> 100 mg CaCO3/L).
Ceriodaphnia dubia is for all test conditions the most sensitive species.
For a comprehensive overview of the acute toxicity of (soluble) zinc to aquatic invertebrates,see Chemical Safety Assessment of "Zinc" within the framework of Regulation (EC) No 1907/2006 in the technical dossier (IUCLID section 13).
CONCLUSION:
Based on the study conducted with the structural analogue Fatty acids, C16 -18, zinc salts, the substance Fatty acids, tallow, zinc salts is not expected to have short-term effects on aquatic invertebrates up to its limit of water solubility.
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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