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EC number: 202-597-5
CAS number: 97-63-2
Long-term daphnia: 21-day NOEC 18 mg/L (Daphnia magna)
In a valid OECD 211, the 21-day
LOEC for Daphnia magna was 31 mg/L; the NOEC for reproduction was 18
For ethyl methacrylate the long-term study in Daphnia magna showed
a LOEC of 31 mg/L and a NOEC for reproduction of 18 mg/L. Data are
available for the lower alkyl methacrylates category which indicate a
trend of increasing toxicity (21 -d NOEC/LOEC) 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 long-term effects on invertebrates
NOEC / LOEC
OECD 202 p. 2 (flow-through)
OECD 202 p. 2
(semi-static, closed vessels)c
0.29a, c/ 0.64a, c
OECD 202 p. 2 (semi-static, closed vessels)
OECD 211 (semi-static, closed vessels)
on measured concentrations;bbased on analytically confirmed
nominal concentrations;cdispersant used, but NOEC and LOEC
within the range of solubility
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