Registration Dossier

Diss Factsheets

Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

The acute toxicity of KMPS triple salt to aquatic algae was tested in two key studies. One acute toxicity test was performed according to the EU Guideline C3 and to the OECD Guideline 201. The second test was performed according to the US EPA guideline 850.5400, 1996.

Key value for chemical safety assessment

EC50 for freshwater algae:
1 mg/L
EC50 for marine water algae:
0.556 mg/L
EC10 or NOEC for freshwater algae:
0.5 mg/L
EC10 or NOEC for marine water algae:
0.444 mg/L

Additional information

The acute toxicity tests in algae and diatoms were performed according to guideline OECD 201, without deviations.The test systems were static and Selenastrum capricornutum (freshwater) and Skeletonema costatum (marine) were used as test organisms.Algae and diatoms were exposed for 72 h to 5 different concentrations in order to derive EC50-values.

It is important to note that the marine test is likely to overestimate the toxicity to KMPS triple salt, because in salt water oxidation of KMPS triple salt generates chlorine from sodium chloride, increasing the biocidal activity of test solutions. Further, as results obtained from these exponential test systems cannot be used without logarithmic transformation, only growth rate ErC50-values are relevant (TGD, 2003). Based on the behaviour of KMPS triple salt in sea water and the marginal ErC50-values obtained, classification and labelling with N, R50 or Acute env. tox. cat. 1, H400, according to Directive 67/548/EC (DSD) and Regulation 1272/2008/EC (CLP), respectively, does not apply.