Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
PNEC aqua (freshwater)
PNEC value:
0.046 µg/L
Assessment factor:
3
Extrapolation method:
sensitivity distribution

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.86 µg/L
Assessment factor:
10
Extrapolation method:
assessment factor

STP

Hazard assessment conclusion:
PNEC STP
PNEC value:
0.025 mg/L
Assessment factor:
1
Extrapolation method:
assessment factor

Sediment (freshwater)

Hazard assessment conclusion:
PNEC sediment (freshwater)
PNEC value:
438.13 mg/kg sediment dw
Assessment factor:
10
Extrapolation method:
assessment factor

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
438.13 mg/kg sediment dw
Assessment factor:
10
Extrapolation method:
assessment factor

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
PNEC soil
PNEC value:
1.05 mg/kg soil dw
Assessment factor:
3
Extrapolation method:
sensitivity distribution

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

For potassium dicyanoargentate, it is likely that the cyanide component will be degraded in STP, and the silver released to the environment from the silver cyanide complex will behave in a similar manner to ionic silver in the environment. Therefore, PNEC values for potassium dicyanoargentate are read across from the ionic silver REACH dossier.

Conclusion on classification

Experimental ecotoxicity data are not available for all trophic levels for potassium dicyanoargentate, but there is a large amount of data available for the components of the substance (silver and free cyanide). Therefore, in order to minimise unnecessary testing, a calculation approach was used for determining the toxicity of potassium dicyanoargentate to fish and algae using the extensive information that already exists on the toxicity of the metal ion and free cyanide, and on the speciation of potassium dicyanoargentate in ecotoxicity test solutions.


 


The most sensitive endpoint was determined to be Daphnia, with an experimental EC50 of 0.022 mg/L (Brixham 2012a). The acute ERV is ≤ 1 mg/L, therefore the test item is classified as hazardous to the aquatic environment with Acute Category 1 (see Fig. IV.4 of CLP Guidance version 5.0 (July 2017)). An acute M-factor of 10 is assigned (acute ERV of 0.022 mg/L (substance basis); see Table IV.1 of CLP Guidance version 5.0 (July 2017)).


 


For the long-term aquatic hazard, data are read accross from soluble silver. The chronic ERV of 0,0001 mg Ag/L corresponds to a chronic ERV of 0,00018 mg/L for KAg(CN)2. Therefore, the test item is classified as Category Chronic 1 (see Fig. IV.5 of CLP Guidance version 5.0 (July 2017)). A chronic M-factor of 100 assigned (see Table IV.1 of CLP Guidance version 5.0 (July 2017)).