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Short-term toxicity to fish

BASF AG, 1998, 17F0206/965059, OECD 203, GLP, static, Danio rerio, 96 h LC50 = 63.03 mg/L (based on analytically verified nominal concentrations).

Based on this result 1,2-dimethylimidazole is considered to be acutely harmful to fish.


Long-term toxicity to fish

A study on the long-term toxicity to fish was waived.


Short-term toxicity to aquatic invertebrates

BASF AG, 1997, 96/0276/50/11, EU method C.2, GLP, static, Daphnia magna, EC50 > 100 mg/L (based on measured concentration).

Based on this result 1,2-dimethylimidazole is considered with high probability acutely not harmful to aquatic invertebrates.


Long-term toxicity to aquatic invertebrates

BASF SE, 2022, QSAR Toolbox v4.5, trend analysis, substance within the applicability domain, Daphnia magna,  21 d NOEC = 21.3 mg/L.

Based on this result no long-term effects on aquatic invertebrates are expected.


Toxicity to aquatic algae and cyanobacteria

BASF SE, 2013, 60E0074/12X207, OECD 201, GLP, Pseudokirchnerella subcapitata, analytically verified values, ErC10 = 19.73 mg/L, Er50 = 58.1 mg/L.

Based on this result, 1,2-dimethylimidazole is considered to be harmful to aquatic algae and long-term effects are not expected.


Toxicity to microorganisms

BASF SE, 2013, 08G0074/12G233, OECD 209, GLP, inoculum = domestic non-adapted activated sludge, EC10 = 3 mg/L, EC50 = 64 mg/L

Based on this result, and depending on local conditions and existing concentrations, disturbances in the biodegradation process of activated sludge are possible.