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Toxicity to aquatic plants other than algae

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Description of key information

The substance is with high probability acutely not harmful to aquatic plants.

Key value for chemical safety assessment

Additional information

Ammonium [trisulphamoyl-29H,31H-phthalocyaninesulphonato(3-)-N29,N30,N31,N32]cuprat e(1-) (CAS 94534-99-3) belongs to the substance category of Phthalocyanines whose category members resemble in their chemical structure as well as in their physico-chemical properties. Thus, read-across data from analogous substances of the phthalocyanine category were used to cover this endpoint.

Due to difficult substance testing issues (the substance is strongly coloured) the chemical safety assessment is based on the available read-across data on aquatic plants other than algae in accordance with REACH guidance chapter R.7b (ECHA, 2017):

 

The acute toxicity of the source substance CAS 28901-96-4 to aquatic plants (other than algae) has been examined in a GLP guideline study according to OECD 221 with the test species Lemna gibba (BASF SE, 2015). At test termination after 7 d, an EC50 > 100 mg/L (nominal) relating to growth rate was determined.

 

In addition, the acute toxicity of the source substance CAS 90295-08-2 to aquatic plants (other than algae) has been examined in a GLP guideline study according to OECD 221 using Lemna minor as test organismus (Achroma, 2016). A 7d EC50 of > 1000 mg/L (nominal) relating to growth rate was determined.

 

Conclusion:

Based on the available read-across data, Ammonium [trisulphamoyl-29H,31H-phthalocyaninesulphonato(3-)-N29,N30,N31,N32]cuprat e(1-) (CAS 94534-99-3) is assessed to be with high probability acutely not harmful to aquatic plants.