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EC number: 271-089-3
CAS number: 68515-47-9
Toxicity to microorganisms:Results from a short-term toxicity study with a population of microorganisms from a sewage treatment plant show that DIDP, an analog to DTDP, does not inhibit respiration at a high concentration, in excess of its water solubility. Results from a short-term toxicity study with Photobacterium phosphoreum, show that DIDP, an analog to DTDP, does not cause toxicity to an aquatic bacterium at a high concentration, in excess of its water solubility.
of short-term toxicity studies for toxicity to sewage treatment
organisms and microorganisms are reported as EC50 and NOEC
values. The NOEC values from these studies represent the highest
concentration tested and measured under the conditions of the study.
The data used to characterize the microbial
toxicity of di-isotridecyl phthalate ester (DTDP) are for di-isodecyl
phthalate (DIDP; CAS #68515-49-1) ester, which is an analog to DTDP.
Results of studies with DIDP suggest that DTDP will not cause toxic
effects to bacteria at levels equivalent to and above its maximum
attainable solubility. DTDP and DIDP contain alkyl groups that are
branched. 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 can be used to
characterize the biological effects of DTDP for this endpoint.
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