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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Additional information

Acute Fish Toxicity:

Water accommodated fractions of hydrocarbons, C10-C12, isoalkanes, <2% aromatics produced a 96-hour LL50 value of >1000 mg/L and LL0 value of 1000 mg/L with rainbow trout, Oncorhynchus mykiss. No mortality was observed in either the control or treatment test systems. These data are used as read-across data to hydrocarbons, C11-C12, isoalkanes, <2% aromatics.

Chronic Fish Toxicity:

The hydrocarbons, C11-C12, isoalkanes, <2% aromatics, estimated freshwater fish 28-day NOELR (No Observed Effect Loading Rate) value is 0.209 mg/l based on growth.

Acute Invertebrate Toxicity:

Freshwater:

Water accommodated fractions of hydrocarbons, C10-C12,isoalkanes, <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. These data are used as read-across data to hydrocarbons, C11-C12, isoalkanes, <2% aromatics.

Marine:

Water accommodated fractions of hydrocarbons, C10-C12,isoalkanes, <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. There was no mortality at the 1000 mg/L loading level after 96 hours. Therefore, the 96-hour NOELR for mortality is reported as 1000 mg/L. There was also no mortality in the control. These data are used as read-across data to hydrocarbons, C11-C12, isoalkanes, <2% aromatics.

Chronic Invertebrate Toxicity:

Hydrocarbons, C11 -C12, isoalkanes, <2% aromatics, showed no effects on survival, reproduction, or length at nominal and measured concentrations of 0.020 and 0.011mg/L, respectively. Therefore, the 21-Day No Observed Effect Loading Rate (NOELR) and No Observed Effect Concentration (NOEC) values are 0.020 and 0.011 mg/L, respectively, for these endpoints based upon nominal loading rates and measured (geometric means) concentrations.

Algal Toxicity:

Growth of alga cultures, as measured by biomass and growth rate, exposed to a water accommodated fraction of hydrocarbons, C10-C12, isoalkanes, <2% aromatics, was not inhibited over 72 hours. The growth of algae in the the test systems was greater than the controls, which performed normally. Therefore, the 72-hr EL50 values for the two endpoints are reported as >1000 mg/L. The 72-hr NOELR values for biomass and growth rate are reported as 1000 mg/L, respectively. These data are used as read-across data to hydrocarbons, C11-C12, isoalkanes, <2% aromatics.

Toxicity to microorganisms:

Isododecane at the highest loading rate, 2 ml/L, did not inhibit the respiration rate of Pseudomonas putida over an exposure period of 5 hours. These data are used as read-across data to hydrocarbons, C11-C12, isoalkanes, <2% aromatics. In addition, the hydrocarbons, C11-C12, isoalkanes, <2% aromatics, estimated protozoan, Tetrahymena pyriformis, 48-hr EL50 value for this substance is >1000 mg/L based on growth inhibition.