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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

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).

The above studies were conducted with B-TTEGME containing mixtures. These test materials, i.e., methyl borated esters and brake fluids, contained 44 and 35% B-TTEGME, respectively. The tests were conducted up to 1000 mg test material/L, corresponding to 350 and 440 mg B-TTEGME/L. For the assessment of these studies it is assumed that neither synergistic nor antagonistic effects influence the toxicity of B-TTEGME and - as worst case scenario - the toxicity observed for the mixture is only due to the toxicity of B-TTEGME. The concentration of B-TTEGME in the respective mixtures was used to calculate the effect concentrations for B-TTEGME.

The (acute) LC50 and EC50 values for (freshwater) fish, daphnids algae were >444.8, >422.4 and >448.8 mg B-TTEGME/L. The EC50 for STP microorganisms was > 1000 mg B-TTEGME/L.

Experimental information about toxicity on marine organisms is not available.

Based on the facts that B-TTEGME is ready biodegradable, hydrolyses quickly, has a log Pow of << 3, has a low Koc resulting in a low likelihood to partition to sediment and is not toxic to pelagic aquatic organisms, B-TTEGME is not expected to cause adverse effects on sediment organisms and consequently sediment toxicity tests do not need to be conducted to assess the risk for sediment-dwelling organisms.

Experimental results and scientific assessments indicate that Daphnia magna was the most sensitive species of the aquatic compartment with an EC50 of > 422.4 mg B-TTEGME/L. Hence, the most conservative, worst case endpoint for the freshwater aquatic environment is 422.4 mg B-TTEGME/L. This value will be used for the CSA. This value is higher than the limit for classification and labeling, i. e., higher than 100 mg B-TTEGME/L.