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Ecotoxicological information

Short-term toxicity to fish

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Description of key information

According to the guideline U.S. EPA. 1986. 40 CFR Part 797 the short-term toxicity of disodium-naphthalene-1,5-disulphonate on fathead minnows was determined. In a read-across approach disodium-naphthalene-1,5-disulfonate was chosen as surrogate of naphthalene-1,5-disulphonic acid. One concentrations of 1000 mg/L was tested.

At 1000 mg/L no effect on fathead minnows was obseved within 96 hours depending on mortality. The substance is not toxic for fathead minnows.

To calculate an LC50-value was not possible, therefore a 96h-LC50 of > 1000 mg/L was reported.

Since no mortality in the controls were observed, the dissolved oxygen was > 7 mg/L at 21.7 - 22.3°C, and the pH-value differs less than 1.5 units (pH 7.3 - 8.3) during the test period, the test was considered as valid.

Key value for chemical safety assessment

Fresh water fish

Fresh water fish
Effect concentration:
1 000 mg/L

Additional information

Due to no effect within 96 hours was observed on fathead minnow up to a concentration of 1000 mg/L, no calculation of an LC50-value was possible.

A 96h-LC0 of > 1000 mg/L was reported.