Registration Dossier

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Additional information

Experimental investigations of 1-Propanesulfonic acid, 3-mercapto-, monosodium salt regarding the aquatic environment are only available concerning the toxicity towards aquatic microorganisms. All other available data are generated based on scientifically accepted QSAR methods.

Short - term toxicity to aquatic species

The acute toxicity of the substance to fish, daphnids and green algae was estimated by the computer program ECOSAR v1.00, predicting the following values: EC50(96h): 7560 g/L for fish, EC50(48h): 2220 g/L for daphnids and an EC50(96h) value of 95.92 g/L for green algae, respectively (Chemservice S.A., 2011). This procedure is a scientifically accepted calculation method, therefore the result is taken into account for the risk assessment and does not lead to a classification and corresponding labelling of the substance in accordance with GHS (Regulation (EC) 1272/2008).

Long - term toxicity to aquatic species

For fish, a ChV of 813 g/L (8.13E5 mg/L) was predicted, for daphnids the value is 76023 mg/L and for green algae (species not further specified) a Chronic Value of 12480 mg/L is reported (Chemservice S.A., 2011). A low concern for long-term toxicity is indicated by these values for all aquatic species.

Toxicity to microorganisms

A mixed population of activated sewage sludge microorganisms was used to test the toxicity towards aquatic microorganisms according to OECD Guideline 209 (Wadsley, 2012). Test substance concentrations of 10, 100 and 1000 mg/L were used. The exposure period was 3 hours at a temperature of 20 +/- 2 °C with addition of synthetic sewage as respiratory substrate. The EC50(3h) was found to be > 1000 mg/L with a corresponding No Observed Effect Concentration (NOEC) of 1000 mg/L.

Toxicity to other aquatic plants than algae and other aquatic organisms

This information is not available and / or not required under REACH.