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Short-term toxicity to aquatic invertebrates

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Description of key information

The water accommodated fraction (WAF) of hydrocarbons, C10-C13, n-alkanes, isoalkanes, cyclics, <2% aromatics, did not produce a 50% effect (immobility) with Daphnia magna at a loading of 1000 mg/L after a 48-hour exposure. Therefore, the 48-hour LL50 is reported as >1000 mg/L. There was no mortality at the 1000 mg/L loading level after 48 hours. Therefore, the 48-hour LL0 for mortality is reported as 1000 mg/L. There was also no mortality in the control.
Water accommodated fractions (WAFs) of hydrocarbons, C9-C11, n-alkanes, isoalkanes, cyclics, <2% aromatics, did not produce a 50% effect (mortality) with Chaetogammarus marinus at loadings up to 1000 mg/L after a 96-hour exposure. Therefore, the 96-hour LL50 is reported as >1000 mg/L. Mortality was observed in the 3 highest loadings, 100, 320, and 1000 mg/L after 96 hours, but no greater than 40% mortality was demonstrated and the two highest loading levels demonstrated only 20% mortality. Therefore, the 96-hour NOELR for mortality is reported as 32 mg/L. There was also no mortality in the control. These data are used as read-across data to hydrocarbons, C10-C13, n-alkanes, isoalkanes, cyclics, <2% aromatics.

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Additional information

The water accommodated fraction (WAF) of hydrocarbons, C10-C13, n-alkanes, isoalkanes, cyclics, <2% aromatics, did not produce a 50% effect (immobility) with Daphnia magna at a loading of 1000 mg/L after a 48-hour exposure. Therefore, the 48-hour LL50 is reported as >1000 mg/L. There was no mortality at the 1000 mg/L loading level after 48 hours. Therefore, the 48-hour LL0 for mortality is reported as 1000 mg/L. There was also no mortality in the control.

Water accommodated fractions (WAFs) of hydrocarbons, C9-C11, n-alkanes, isoalkanes, cyclics, <2% aromatics, did not produce a 50% effect (mortality) with Chaetogammarus marinus at loadings up to 1000 mg/L after a 96-hour exposure. Therefore, the 96-hour LL50 is reported as >1000 mg/L. Mortality was observed in the 3 highest loadings, 100, 320, and 1000 mg/L after 96 hours, but no greater than 40% mortality was demonstrated and the two highest loading levels demonstrated only 20% mortality. Therefore, the 96-hour NOELR for mortality is reported as 32 mg/L. There was also no mortality in the control. These data are used as read-across data to hydrocarbons, C10-C13, n-alkanes, isoalkanes, cyclics, <2% aromatics.