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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
0.878 µg/L
Assessment factor:
1 000
Extrapolation method:
assessment factor
PNEC freshwater (intermittent releases):
8.78 µg/L

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
87.8 ng/L
Assessment factor:
10 000
Extrapolation method:
assessment factor
PNEC marine water (intermittent releases):
0.878 µg/L

STP

Hazard assessment conclusion:
PNEC STP
PNEC value:
23 µg/L
Assessment factor:
100
Extrapolation method:
assessment factor

Sediment (freshwater)

Hazard assessment conclusion:
PNEC sediment (freshwater)
PNEC value:
3.32 µg/kg sediment dw
Extrapolation method:
equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:
PNEC sediment (marine water)
PNEC value:
0.332 µg/kg sediment dw
Extrapolation method:
equilibrium partitioning method

Hazard for air

Air

Hazard assessment conclusion:
no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
PNEC soil
PNEC value:
0.149 µg/kg soil dw
Extrapolation method:
equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no potential for bioaccumulation

Additional information

Conclusion on classification

The key ecotoxicity values to assess the aquatic toxicity of the registered substance zinc cyanide are as follow:

- Short-term toxicity to fish:96h-LC50= 1.038 mg/L(based on measured concentrations)

- Short-term toxicity to aquatic invertebrates:48h-EC50 = 3.351 mg/L(based on measured concentrations)

- Toxicity to aquatic algae and cyanobacteria:72h-ErC50= 0.878 mg/L(based on growth rate, measured concentrations). This value represents thelowest acute E(L)C50of the dataset.

- Toxicity to microorganisms:30min-EC50= 2.3 mg/L

Based on these results, the lowest acute E(L)C50 is below 1 mg/L.

CLP Classification proposal

It is proposed to compare submission substance dataset to CLP environmental criteria laid down in CLP Regulation (including 2nd Adaptation to Technical Progress, Com Reg No 286/2011).

Acute aquatic hazard:category 1. Reasoning: lowest E(L)C50 below 1 mg/L. M-factor acute = 1 because the lowest E(L)C50 is between 0.1 and 1 mg/L

Chronic aquatic hazard:category 1. Reasoning: adequate chronic toxicity data are not available. Lowest acute E(L)C50 below 1 mg/L and the substance is regarded as not rapidly degradable.