Registration Dossier

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Additional information

According to key study results of toxicity tests on invertebrates, algae and microorganisms, low toxicity to aquatic organisms was observed (LC50 values >100 mg/L). Fish showed more sensitivity towards 1-chlorobutane with an LC50(96h) of 75.6 mg/L (nominal).

In a chronic study under semi-static conditions, the NOEC(21d) for Daphnia magna resulted in a value of 5.6 mg/L (nominal). The NOECr(72h) for algae was found at 90 mg/L (nominal).

Due to the environmental fate of 1-chlorobutane (volatility, hydrolysis, photodegradation), a low risk of aquatic toxicity is estimated for the substance. Acute and chronic tests show toxicities of 1-chlorobutane far in excess of natural occurring concentrations and additionally the substance will readily disappear from the water body.