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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Marine water

Hazard assessment conclusion:
PNEC aqua (marine water)
PNEC value:
0.021 µg/L
Assessment factor:
1 000
Extrapolation method:
assessment factor

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

The aquatic PNECs for dialuminium titanium pentaoxide were derived from short-term studies conducted using freshwater aquatic species from three different trophic levels. It should be noted that the low PNEC values stem from the limited aqueous solubility of dialuminium titanium pentaoxide rather than a high intrinsic toxicity. The PNECs are as follows:

PNEC aqua (freshwater)= >0.210 µg/l

PNEC aqua (marine water)= >0.0210 µg/l

PNEC aqua (intermittent releases)= >2.10 µg/l

The derivation of PNECs for the other compartments was not considered necessary as aluminium and titanium occur ubiquitously in the environment at concentrations which are high compared to that which is likely to arise from dialuminium titanium pentaoxide.

Conclusion on classification

Environmental classification justification

This substance does not warrant any classification.

The acute toxicity of the substance to aquatic organisms was measured up to the limit of solubility. Although the lowest LC50 for the substance is less than 1 mg/l, it is judged that the substance should not be classified as toxic to aquatic life based on observed solubility levels. It is likely that the true LC50 is far greater but this would be in excess of the maximum solubility of the substance and as such this concentration could not be achieved in laboratory tests or in the environment.

As the aquatic toxicity tests were conducted according to the OECD series on testing and assessment number 23 (guidance document on aquatic toxicity testing of difficult substances and mixtures) with a maximum loading rate of 100 mg/l, the concentration of the substance dissolved in the aquatic toxicity tests is considered to be equivalent to the concentration that would occur in a 7 -day transformation/dissolution test at a high loading rate. Further to this in a 14 -day solubility test at 40 degrees Celsius with a maximum loading rate of 1000 mg/l, the solubility of the test substance was found to be less than 0.1 mg/l. This evidence strongly indicates that the test substance will not be soluble in the environment at a concentration that will result in significant toxicity.

As such, no classification is triggered based on the available data, according to EEC directive 79/831/EEC Annex VI, Part II (D) as described in Commission Directive 93/21/EEC or regulation (EC) No 1272/2008. No hazards for the environment have been identified.

In addition dialuminium titanium pentaoxide is not a PBT (or vPvB) substance (see section 2.3).