Registration Dossier

Diss Factsheets

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:
no potential for bioaccumulation

Additional information

Conclusion on classification

Environmental classification for the poorly water soluble substances under consideration is based on the lowest acute and chronic threshold values from the Ruthenium ecotoxicity test data combined with TDp test data generated as outlined in OECD Guidance Document on Transformation/Dissolution of Metals and Metal Compounds in Aqueous Media (OECD, 2001).

Ruthenium dioxide has been tested in a full TDp assay according to OECD TG29 (cfr. details in IUCLID section 4 'Water solubility'). Ruthenium dioxide dissolution [in µg/L] in this assay is summarised as:

  24h Screening*   7d TDp   28d TDp
    MWt Ru Wt% 100 mg/L@pH6 100 mg/L@pH8.5 1 mg/L 10 mg/L 100 mg/L 1 mg/L
ruthenium(IV) oxide RuO2 133.07 76.0 0.9 0.17 <0.01 <0.01 0.08 <0.01

*values in bold give the highest metal release. The consequent 7 and 28 day tests are performed at this pH value.

The acute and chronic ERV values, derived with other water soluble ruthenium subtances, are 115 µg Ru/L (72h EC50 value for P.subcapitata with tetraammonium decachloro-µ-oxodiruthenate (Wenzel 2016)) and 6 µg Ru/L (72h EC10 for P. subcapitata with tetraammonium decachloro-µ-oxodiruthenate (Wenzel 2016)

) corresponding to 151 and 7.9 µg RuO2/L (conversion based on molecular weight conversion from soluble ion to the substance considered).

Comparing the acute and chronic ERV values with the TDp test results (cfr table below) as outlined in ECHA Guidance on the application of the CLP criteria (version 5.0; ECHA, 2017), it is concluded that the metal release at all doses and duration relevant for classificiation are well below the ERV values, and that no classification for environmental hazard is required:

  Acute ERV
(µg TI/L)
Chronic ERV
(µg TI/L)
24h Screening 7d TDp 28d TDp Acute aquatic hazard Long-term aquatic hazard
    MWt Ru Wt% 100 mg/L@pH6 100 mg/L@pH8.5 1 mg/L 10 mg/L 100 mg/L 1 mg/L
ruthenium(IV) oxide RuO2 133.07 76.0 151.42 7.90 0.9 0.17 <0.01 <0.01 0.08 <0.01 not classified not classified

*values in bold give the highest metal release. The consequent 7 and 28 day tests are performed at this pH value.

Categories Display