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Ecotoxicological information

Short-term toxicity to fish

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Description of key information

Acute fish: 96 hr LC50 100 mg/L Salmo gairdneri (new name: Oncorhynchus mykiss)  

Key value for chemical safety assessment

LC50 for freshwater fish:
100 mg/L

Additional information

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

Ester

Fish Species

LC50(mg/l)

Exposure time

Study Type

Remarks

Reference

MAA

Rainbow Trout (Oncorhynchus mykiss)

85b

96 h

EPA guideline 660/ 3-75-009a

Rel. 1

Bowman, 1990a

MMA

Rainbow Trout (Oncorhynchus mykiss)

>79b

96 h

EPA guideline 660/ 3-75-009a

Rel. 1

Bowman, 1990b

EMA

Rainbow Trout (Oncorhynchus mykiss)

100b, c

96 h

OECD 203

(flow-through)

Rel. 1

Sousa, 1995a

i-BMA

Rainbow Trout (Oncorhynchus mykiss)

20b, c

96 h

OECD 203

(flow-through)

Rel. 1

Sousa, 1995b

n-BMA

Fathead Minnow (Pimephales promelas)

11b

96 h

OECD 203

(flow-through)

Rel. 2

Morris, 1993

n-BMA

Medaka
 (Oryzias latipes)

5.57b, c

 

96 h

OECD 203

 (semi-static 24 h)

Rel. 1

MoE, 1998a

2-EHMA

Medaka
 (Oryzias latipes)

2.78b, c, d)

96 h

OECD 203

(semi-static 24 h)

Rel. 2

MoE, 1998b

aequivalent to OECD 203;bbased on measured concentrations;cdispersant used;dmost test concentrations were above the limit of solubility.