Registration Dossier
Registration Dossier
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EC number: 694-876-7 | CAS number: 1345668-41-8
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Hazard for air
Hazard for terrestrial organisms
Hazard for predators
Additional information
The ecotoxicity of a read-across substance, hydrocarbons, C7-C9, n-alkanes, isoalkanes, cyclics, has been examined in a series of studies on fish, Daphnia, and algae, and additional QSAR modelling has been performed. The most conservative results of aquatic studies showed this substance to be of moderate toxicity, with LL50 or EL50 values of 3 mg/L (fish), 4.6 mg/L (Daphnia), and 10 mg/L (algae). All studies were conducted using Water Accomodated Fractions (WAFs) studies because of the limited water solubility. QSAR modelling data on microorganisms resulted in an EL50 of 11.14 mg/L. A study on the chronic toxicity to Daphnia resulted in a NOELR of 1 mg/L. Further QSAR modelling was performed to address chronic toxicity to fish and a NOELR was found to be 0.574 mg/L. Standard tests for terrestrial endpoints are intended for single substances and are not appropriate for the risk assessment of this complex substance. For the purpose of risk assessment, soil PNECs for hydrocarbon blocks have been derived using aquatic PNECs and the equilibrium partitioning method (EqP) using representative structures. Studies on long-term or reproductive toxicity to birds do not need to be conducted due to the existence of a large mammalian dataset demonstrating low toxicity to higher organisms.
Read across justification is provided in the Read Across Document attached to Section 13.
Conclusion on classification
The substance is readily biodegradable (read-across). The most sensitive acute aquatic values is an LL50 of 3 mg/L (fish). The chronic toxicity value is 1 mg/L (experimental result) or 0.574 mg/L (estimated with QSAR model). Thus, the substance is not classified as Aquatic Chronic Category 2 according to EU GHS, but classified R 51/53 according to DSD/DPD.
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