According to the results of the ECHA, the substance must also be marked as environmentally hazardous (Aquatic Acute 1, H400; Aquatic Chronic 1, H410). Even though these are EC50 values for algae at 48 h, it can be assumed that the substance has environmentally hazardous properties. If the user has traceable data for an exposure duration of 72 h or 96 h, which do not require classification as environmentally hazardous substance, the mark can be omitted.