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EC number: 202-597-5
CAS number: 97-63-2
Acute fish: 96 hr LC50 100 mg/L Salmo gairdneri (new name: Oncorhynchus mykiss)
For ethyl methacrylate the study in Onchorynchus mykiss showed a
96 -hr LC50 of 100 mg/L. Data are available for the lower alkyl
methacrylates category which indicate a trend of increasing toxicity (96
h LC50) 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 fish
Rainbow Trout (Oncorhynchus mykiss)
EPA guideline 660/ 3-75-009a
Fathead Minnow (Pimephales promelas)
Medaka (Oryzias latipes)
(semi-static 24 h)
2.78b, c, d)
(semi-static 24 h)
to OECD 203;bbased on measured concentrations;cdispersant
used;dmost test concentrations were above the limit of
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