Registration Dossier

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
no hazard identified

Marine water

Hazard assessment conclusion:
no hazard identified

STP

Hazard assessment conclusion:
no hazard identified

Sediment (freshwater)

Hazard assessment conclusion:
no hazard identified

Sediment (marine water)

Hazard assessment conclusion:
no hazard identified

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
no hazard identified

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
insufficient hazard data available (further information necessary)

Additional information

Conclusion on classification

Acute EC/LC50 values of tripotassium hexacyanocobaltate available for three trophic levels of aquatic organisms (fish, crustacea and algae) amount to > 100, > 100 and 87 mg/L respectively. Thus, all acute effect concentrations are well above classification criteria of acute (short-term) hazard to the aquatic environment under Regulation (EC) No 1272/2008.

A long-term (chronic) EC10/NOEC value is with a 72-h EC10 of 33.35 mg/L tripotassium hexacyanocobaltate only available for algae and well above classification criteria of long-term hazard to the aquatic environment under Regulation (EC) No 1272/2008. Based on the surrogate approach (Table 4.1.0 (b) (iii) of Regulation (EC) No 1272/2008), tripotassium hexacyanocobaltate would also not meet chronic classification criteria since acute effect concentrations for fish and crustacea are > 100 mg/L. Criteria for the "Safety net" classification in Category Chronic 4 are also not met. In accordance with Regulation (EC) No 1272/2008, classification for long-term aquatic hazard is not required for tripotassium hexacyanocobaltate.

In sum, tripotassium hexacyanocobaltate does not meet aquatic hazard criteria of Regulation (EC) No 1272/2008 and its subsequent adaptations.