Registration Dossier
Registration Dossier
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EC number: 273-521-6 | CAS number: 68988-22-7 A complex residuum from the distillation of products from the manufacture of dimethyl terephthalate by air oxidation and esterification of p-xylene. It consists of polyphenyl polyesters.
Endpoint summary
Administrative data
Description of key information
Additional information
According to OECD 301B and EU-method C.4-C (CO2 -evolution), ready biodegradability of the submission substance had been assessed compliant to GLP. The positive control sample was degraded by 75% within 14 days, proving the functionality of the test system. No inhibition of microbial toxicity by the submission substance could be observed with the toxicity control. The calculated relative biodegradation of the duplicate samples of the submission substance were 29% and 24% within 28 days. Concluding from these experimental results, despite some biodegradation was observed the submisson substance fails the criteria for ready biodegradability (at least 60% biodegradation within a 10-day window).
Further tests on biodegradability (simulation tests) have not been performed due to exposure considerations (waiving based on Annex XI 3.2. (b)).
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