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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
0.004 mg/L
Assessment factor:
50
Extrapolation method:
assessment factor

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0 mg/L
Assessment factor:
500
Extrapolation method:
assessment factor

STP

Hazard assessment conclusion:
no hazard identified

Sediment (freshwater)

Hazard assessment conclusion:
no exposure of sediment expected

Sediment (marine water)

Hazard assessment conclusion:
no exposure of sediment expected

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

Classification related key information

Water solubility: Transformation/dissolution test (28 d, OECD 29)

28 d: < 1 µg Al/L (0.1 mg/L loading), < 1 µg Zn/L (0.1 mg/L loading); < 1 µg Al/L (1 mg/L loading), 6.3 µg Zn/L (1 mg/L loading)

Biodegradation in water: not applicable (inorganic substance)

Aquatic acute toxicity:

to fish: 96 h, LC50 (Danio rerio): > 100 mg/L (nominal)

to aquatic invertebrates: 48 h, EC50 (Daphnia magna): > 100 mg/L (nominal)

to algae: 72 h, ErC50 (Desmodesmus subspicatus): > 100 mg/L (nominal)

Aquatic chronic toxicity:

to fish: no data available

to aquatic invertebrates: 21 d, NOEC (Daphnia magna): 0.19 mg/L (nominal); 6.02 ng Al/mL, 6.88 ng Zn/mL (measured, TWA)

to algae: 72 h, NOErC (Desmodesmus subspicatus): >= 100 mg/L (nominal)

 

Classification justification according to CLP

Based on the data above, there is no evidence of rapid environmental transformation of Zinc aluminium oxide. The acute aquatic toxicity L(E)C50 values are > 100 mg/L for fish, aquatic invertebrates and algae regarding nominal concentrations. Valid chronic toxicity data are available - the lowest NOEC is 0.19 mg/L (nominal) for aquatic invertebrates.

As outlined in the Guidance on the application of the CLP criteria (ECHA, 2012), the classification of poorly soluble metal compounds should be performed by comparing the ecotoxicity reference values (ERV) of the soluble metal ion with the soluble fraction measured within the transformation/dissolution test. The concentration of Zn at 1 mg/L loading rate after 28d resulting from the Transformation/dissolution test (6.3 µg/L) is in the same range as the chronic Environmental Reference Value derived from the chronic study on Daphnia magna (6.88 µg Zn/L).

Therefore, following the “Guidance on the application of the CLP criteria, IV. Metals and inorganic metal compounds (ECHA, 2012)" according to Regulation (EC) 1272/2008 (CLP) with regard to the results of the Transformation/dissolution test, Zinc aluminium oxide needs to be classified and labelled as environmental hazard Aquatic Chronic 2 according to the Regulation (EC) No.1272/2008 (CLP) and the Regulation (EU) No. 286/2011 (2nd ATP).

M-factor for acute aquatic toxicity: -

M-factor for chronic aquatic toxicity: -