Registration Dossier
Registration Dossier
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EC number: 244-971-0 | CAS number: 22413-03-2
Sediment toxicity
Administrative data
Link to relevant study record(s)
Description of key information
Key value for chemical safety assessment
Additional information
Based on all the available information, toxicity to sediment organisms is not expected to be of concern.
No experimental data evaluating the toxicity of the target substance Docosyl stearate (CAS 21443-03-2) to sediment organisms are available. However, the substance is characterized by poor water solubility (< 0.504 mg/L, 20 °C, OECD 105) and only negligible discharge to the aquatic environment is expected to occur via sewage treatment plants (STPs) due to: a) the ready biodegradability and b) the high adsorption properties of the substance, resulting in an effective removal in sewage treatment plants. Whatever fraction should still reach the water compartment is expected to undergo rapid and ultimate degradation and the remainder will adsorb to organic soil and sediment particles where sediment organisms are potentially exposed via feed and contact with suspended organic particles. However, based on the physico-chemical properties, the bioavailability of the substance is expected to be low due to its strong binding behavior. Therefore, chronic exposure of sediment organisms is unlikely. Furthermore, the substance is not toxic to aquatic organisms up to the limit of water solubility.
Based on all the available information, toxicity to sediment organisms is therefore not expected to be of concern.
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