Registration Dossier
Registration Dossier
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EC number: 245-629-3 | CAS number: 23386-52-9
Endpoint summary
Administrative data
Description of key information
daphnids were the most sensitive trophic level with an acute EC50 of 439 mg a.i. /L.
Additional information
The environmental hazard assessment for (fresh-) water organisms and sediment habitats is supported by several acute studies (pelagic compartment) and by using scientific argumentation (sediment dwelling organisms).
For the environmental hazard assessment of the registered substance acute toxicity studies for freshwater fish, daphnids, freshwater algae and STP microorganisms are available. Long-term studies for fish and daphnids are waived. Experimental information about toxicity on marine organisms is not available.
The above studies were conducted with test material which contained the submission substance at >= 96% or as aqueous solution containing 30.1 % active matter . The concentration of a.i. in the respective test materials was used to calculate the effect concentrations for the registered substance.
The short-term EC50/LC50 values for fish, Daphnia, algae and microorganisms were 451.2, 439, 903 mg a.i./L. Toxicity to microorganisms is low. The NOEC is > 1000 mg/L.
The registered substance has a log Pow of << 3 resulting in a low likelihood to partition to sediment and is only moderately toxic to pelagic aquatic organisms. Therefore, the registered substance is not expected to cause adverse effects on sediment organisms. Consequently sediment toxicity tests do not need to be conducted to assess the risk for sediment-dwelling organisms.
The daphnids were the most sensitive trophic level with an acute EC50 of 439 mg a.i. /L. This value will be used as worst case scenario for the risk assessment of aquatic organisms.
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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