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EC number: 202-597-5
CAS number: 97-63-2
Acute daphnia: 48 hr EC50 >66 mg/L Daphnia magna
For ethyl methacrylate the study in Daphnia magna showed a 48-hr
EC50 of >66 mg/L. Data are available for the lower alkyl methacrylates
category which indicate a trend of increasing toxicity (48 h EC50)
from the acid and the methyl ester to the ester with the longest side
chain in the category, 2‑EHMA. See the following table:
Summary of short-term effects on invertebrates
TSCA 797.1300***(static, closed vessels)
>66a, c *
OECD 202 (flow-through)
Kent et al., 1993
OECD 202 (static, closed vessels)
>29a, c **
(4.6a, c, d)
*Only 25 % of
the test organisms were immobilised at the highest achievable
20 % of the test organisms were immobilised at the highest achievable
to OECD 202
on measured concentrations;bbased on analytically confirmed
nominal concentrations;cdispersant used;dmost test
concentrations, including the EC50were above the limit of
[m1]New explanation re other data and use of
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