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EC number: 202-597-5 | CAS number: 97-63-2
Short-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
Description of key information
Acute daphnia: 48 hr EC50 >66 mg/L Daphnia magna
Key value for chemical safety assessment
Additional information
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
Ester |
Invertebrate Species |
EC50(mg/l) |
Exposure time |
Study Type |
Remarks |
Reference |
MAA |
Daphnia magna |
>130b |
48 h |
TSCA 797.1300***(static, closed vessels) |
Rel. 1 |
Burgess, 1990a |
MMA |
Daphnia magna |
69b |
48 h |
TSCA 797.1300***(static, closed vessels) |
Rel. 1 |
Bowman, 1990b |
EMA |
Daphnia magna |
>66a, c * |
48 h |
OECD 202 (flow-through) |
Rel. 1 |
Putt, 1995a |
n-BMA |
Daphnia magna |
32a |
48 h |
TSCA 797.1300***(static, closed vessels) |
Rel. 1 |
Kent et al., 1993 |
Daphnia magna |
25.4b, c |
48 h |
OECD 202 (static, closed vessels) |
Rel. 1 |
MoE, 1998a |
|
i-BMA |
Daphnia magna |
>29a, c ** |
48 h |
OECD 202 (flow-through) |
Rel. 1 |
Putt, 1995b |
2-EHMA |
Daphnia magna |
> w.sol. (4.6a, c, d) |
48 h |
OECD 202 (static, closed vessels) |
Rel. 2 |
MoE,1998b[m1] |
*Only 25 % of the test organisms were immobilised at the highest achievable concentration
**only 20 % of the test organisms were immobilised at the highest achievable concentration
***comparable to OECD 202
abased on measured concentrations;bbased on analytically confirmed nominal concentrations;cdispersant used;dmost test concentrations, including the EC50were above the limit of solubility.
[m1]New explanation re other data and use of mean
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