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Ecotoxicological information

Endpoint summary

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At least one reliable study for any of the three acute trophic levels was reported with EC50 higher than 100 mg/l on the substance showing no general toxicity at high doses. This results are in agreement with the results found for all members of the Stilbene Fluorescent Whitening Agents category.

Regarding long term studies, a Daphnia magna reproductive study is available on the similar substance CAS 16470-24-9. The substance is the analogous substance dihydroxyethylamino derivative tetrasulphonated sodium salt. The diethylamino substituent (CAS 41098-56-0) is less polar, less reactive and makes the molecule less soluble compared to the dihydroxyethylamino derivative (CAS 16470-24-9). This latter can be therefore taken as conservative representative substance for water toxicity testing. The result of the chronic reproductive Daphnia study on the analogous substance CAS 16470-24-9 has been considered to establish the NOEC for the substance (NOEC = 6.59 mg/l).

Acute tests on CAS 16470-24-9 were reported and their results are in agreement with the outcome of CAS 41098-56-0.

No further long term studies are proposed, since direct and indirect exposure is unlikely due to the risk management measures that will be applied at industrial level and discussed in details within the exposure scenario to avoid any release of the substance directly in the municipal waste water treatment. The local RCR in surface water is calculated as 0.059 and 0.0052 based on estimated and monitored quantities, respectively.