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Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Additional information

Analogs of DIUP do not produce acute or chronic toxicity to earthworms or plants at high concentrations in soil. Since DIUP does not pose an acute or chronic hazard to the terrestrial compartment, it is not possible to derive NOECs or PNECs needed for quantitative risk assessment. However, it is possible to qualitatively conclude based on available effects test data that DIUP is not harmful to terrestrial organisms. 

I5 Summary

The data used to characterize the terrestrial toxicity of di-isoundecyl phthalate (DIUP; CAS #85507-79-5) ester are for di-isodecyl phthalate (DIDP; CAS #68515-49-1) ester, which is an analog to DIUP. Results of studies with DIDP suggest that DIUP will not cause toxicity to terrestrial organisms and plants at high soil loading levels. DIUP and DIDP both contain branched alkyl groups. Therefore, because of the structural similarity between these substances and the similar biological behavior of high molecular weight phthalate esters in general, data for the analog, DIDP, can be used to characterize the biological effects of DIUP. The terrestrial organism toxicity dataset includes results for an earthworm, Eisenia fetida, and the plant toxicity dataset includes results for two species, Lolium species and Lactuca sativa.