Registration Dossier
Registration Dossier
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EC number: 934-954-2 | CAS number: 1174522-45-2
Short-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
Description of key information
The test substance is poorly soluble and made of constituents with various water solubility. As a consequence, the exposures were performed with Water Accomodated Fractions (WAFs). Therefore, the results are based on nominal loadings and the LC50 value given below is actually a LL50 (lethal loading) value. No LC50 could be derived from the acute toxicity studies.
The 48h-LL50 is > 3000 mg/l.
Key value for chemical safety assessment
Additional information
Eleven study reports were available and input as endpoint summary records. All the studies investigate the toxicity of the substance “Hydrocarbons, C14-C18, n-alkanes, isoalkanes, cyclics, ≤ 2% aromatics” (belonging to the category Hydrocarbons, C14 -C20, aliphatics, <2% aromatics) on a marine copepod, Acartia tonsa exposed to water accommodated fractions (WAFs). Several studies indicate very high values (up to 69 155 mg in Altin, 1998b). In most of the studies the calculation of LL50 could not be achieved
because of the low mortality levels obtained (Aunaas, 1996a and c; Larsen, 2006a, b, d and e; 2008a-c). When more than 5 values are available for LL50, the geometric mean of all the values is considered for LL50. However, in this particular case, as a great number of studies could not achieve the calculation of LL50, the geometric mean cannot be calculated, but 9 studies among 11 found that LL50 was greater than 3000 mg/l. Therefore, it is considered that LL50 is >3000 mg/l.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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