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Ecotoxicological information

Long-term toxicity to fish

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Description of key information

Toxicity figure based on river water testing.

Key value for chemical safety assessment

Fresh water fish

Fresh water fish
Effect concentration:
0.23 mg/L

Additional information

To assess the long-term toxicity of DTDMAC, embryo larval tests were conducted with Pimephales promelas in filtered well water and natural river water (Lewis and Wee, 1983). Exposure was initiated within 48 hours after fertilization and continued through 30 days post hatch in a flow-through system. In well water the most sensitive parameters were mean percent survival, length and weight of larvae. The NOEC was 0.053 mg/L (measured concentration) after 34 days test duration. In river water the NOEC for the most sensitive parameters hatchability and mean weight of larvae was 0.23 mg/L after 33 days test duration.