Registration Dossier

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

The 96 -hour LC50 based on nominal concentrations was 1.25 mg/L with a 95% fiducal interval of 1.18 to 1.34 mg/L. The test substance (based on nominal concentrations) was moderately toxic to fathead minnows, Pimephales promelas, in a 96 -hour static, anaerated test.

The rangefinding study was designed to provide an estimate of aquatic toxicity using fixed test concentrations and data measurements at predetermined intervals. Nominal concentrations tested: 0, 0.5, 1.0, 50, 500, 5000 mg/L. The pH and dissolved oxygen readings have been taken approximately 24 hours after exposure due to total mortality.

Results:

Based on visual observations, all solutions were clear at the test start, except for 50mg/L which was slightly cloudy, white in color. Immobilities were 0, 100, 100, 100, 100 and 100% respectively. The 48 -hour EC50, based on nominal concentrations and immobility, was less than 0.5 mg/L. All water quality parameters were within acceptable limits.

The test substance exhibited extreme toxicity in a 48 -hour, unaerated, static avute test using Ceriodaphnia dubia.

The rangefinding study was designed to provide an estimate of aquatic toxicity using fixed test concentrations and data measurements at predetermined intervals. Nominal concentrations tested: 0, 0.5, 1.0, 50, 500, 5000 mg/L. The pH and dissolved oxygen readings have been taken approximately 24 hours after exposure due to total mortality.

Results:

Based on visual observations, all solutions were clear at the test start, except for 50mg/L which was slightly cloudy, white in color. Immobilities were 0, 100, 100, 100, 100 and 100% respectively. The 48 -hour EC50, based on nominal concentrations and immobility, was less than 0.5 mg/L. All water quality parameters were within acceptable limits.

The test substance exhibited extreme toxicity in a 48 -hour, unaerated, static acute test using Daphnia magna.

Based on the growth inhibition test onPseudokirchneriella subcapitatashowed an EC50 of 2.201 mg/L.

Additional information

The substance to be classified as Aquatic Acute Category 1 and Aquatic Chronic Category 1 based on the aquatic toxicity tests performed on the substance.