Registration Dossier
Registration Dossier
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EC number: 277-242-0 | CAS number: 73037-34-0
Endpoint summary
Administrative data
Description of key information
Additional information
Data on aquatic effects of ditolylether disulfonic acid disodium salt, isomer mixture are available on three trophic levels (fish, daphnia and algae) for acute toxicity.
Acute toxicity to fish (Danio rerio) was determined according to the OECD TG 203. No toxic effect and abnormal behavior were observed. Analytical monitoring confirmed stability of the test substance during 96 hours of exposure. A LC50 of > 100 mg/L based on nominal concentration was obtained.
Concerning the toxicity towards aquatic invertebrates, an acute toxicity test to Daphnia magna was determined according to OECD Guideline 202 (Daphnia sp. Acute Immobilisation Test). No toxic effect and abnormal behavior were observed during 48 hours of exposure. The stability of the test substance was confirmed by analytical monitoring, the EC50 > 100 mg/L relates to nominal concentrations.
The fresh water alga Desmodesmus subspicatus was exposed to ditolylether disulfonic acid disodium salt, isomer mixture for 72 hours. The experiment was conducted according to OECD Guideline 201 (Alga, Growth Inhibition Test). An EC50 of 112.2 mg/l and a NOEC of 50 mg/L, based on nominal concentrations, were obtained in this test. Analytical monitoring was carried out and stability of the test substance was confimed during the duration of exposure.
The effect of ditolylether disulfonic acid disodium salt, isomer mixture towards the growth of activated sludge was investigated according to EU Method C.11 (Biodegradation: Activated Sludge Respiration Inhibition Test) having an EC50 (3 h) of > 1000 mg/L. Therefore, an adverse effect towards microorganisms and thus the cleaning capacity of sewage treatment plants is not expected.
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