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EC number: 310-290-3
CAS number: 161907-80-8
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
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.
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.
information about toxicity on marine organisms is not available.
the facts that B-TTEGME is ready
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.
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.
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