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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

NOECreproduction = 250 mg/kg dw

Additional information

No short-term terrestrial test data is available for Naphthalenesulfonic acid, bis(1-methylethyl)-, methyl dervis., sodium salt. One long-term terrestrial test is performed with Naphthalenesulfonic acid, bis(1-methylethyl)-, methyl dervis., sodium salt.

The effects of Naphthalenesulfonic acid, bis(1-methylethyl)-, methyl dervis., sodium salt on mortality, biomass and reproduction of Eisenia fetida was tested according to OECD 222..

The study was conducted under static conditions over 8 weeks with the test item concentrations 15.625 – 31.25 – 62.5 – 125 – 250 – 500 mg Naphthalenesulfonic acid, bis(1-methylethyl)-, methyl dervis., sodium salt /kg SDW. Each application rate was mixed into artificial soil containing 5 % peat. In addition tests using control were performed.

The test is valid without restrictions and the results are reliable.

After 28 days of exposure in soil, neither evident earthworm mortalities (< 10%) nor pathological symptoms or changes in the behaviour of adult earthworms were observed in the control or all test item concentrations. There were no statistically significant differences in earthworm body weight gains in the test item concentrations 15.625 to 250 mg Naphthalenesulfonic acid, bis(1-methylethyl)-, methyl dervis., sodium salt/kg soil dry weight compared to the control. At the test concentration of 500 mg Naphthalenesulfonic acid, bis(1-methylethyl)-, methyl dervis., sodium salt/kg the earthworm body weight gain was statistically significantly reduced. After a further four weeks, the reproduction rate (average number of juveniles produced) was 127 in the control and ranged from 28 to 139 in the test item treatment rates. There were no statistically significant differences in earthworm reproduction in the treatment rates 15.625 to 250 mg Naphthalenesulfonic acid, bis(1-methylethyl)-, methyl dervis., sodium salt /kg SDW compared to the control. At the test concentration of 500 mg Naphthalenesulfonic acid, bis(1-methylethyl)-, methyl dervis., sodium salt /kg the earthworm reproduction was statistically significantly reduced. Overall, the NOEC of the test item concerning mortality, biomass and reproduction was determined to be 250 mg Naphthalenesulfonic acid, bis(1-methylethyl)-, methyl dervis., sodium salt /kg SDW. The EC50-value for reproduction was determined to be 398 mg Naphthalenesulfonic acid, bis(1-methylethyl)-, methyl dervis., sodium salt/kg SDW.