Registration Dossier

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Administrative data

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:
no data available: testing technically not feasible

Marine water

Hazard assessment conclusion:
no data available: testing technically not feasible

STP

Hazard assessment conclusion:
no data: aquatic toxicity unlikely

Sediment (freshwater)

Hazard assessment conclusion:
no data available: testing technically not feasible

Sediment (marine water)

Hazard assessment conclusion:
no data available: testing technically not feasible

Hazard for air

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:
no data available: testing technically not feasible

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:
no data available: testing technically not feasible

Additional information

Titanium oxychloride effects were assessed on the basis on its hydrolysis products as they are formed quickly in all relevant environmental media. During hydrolysis, hydrochloric acid is formed and thus pH effects may occur. However this is not regarded as true toxicity and is excluded from assessment, which is in accordance with the endpoint related test protocols. Solely the guidance on activated sludge respiration inhibition testing (OECD TGD 209) does not exclude the observation without pH adjustment. Thus read across to hydrochloric acid and to the other transformation product, titanium dioxide was made in order to assess the potential effects to activated sludge caused by pH. As pH effects are more than three orders of magnitude higher than the one of the other transformation product it was concluded that acidity dominates rather than modifies the combined effect. Accordingly the assessment bases on read across from titanium dioxide.

The titanium dioxide formed during hydrolysis is eventually present in the rutile modification (Fisk et al 2010), which is insoluble in water (< 1 µg/L). In order to assess effects of the formed microdisperse particles the experiments with this test item used generally Water Accommodated Fractions (WAFs) together with the insoluble material in excess. In such experiments no relevant ecotoxic effects were being observed.

 

Conclusion on classification

Albeit testing of titanium oxychloride self is technically not feasible due to its hydrolytical instability, the hazard assessment could be accomplished on the basis of read across to the transformation products. The relevant transformation product for the effects on algae, daphnids or crustacea, and fish is titanium dioxide in the rutil modification. As evidenced experimentally by studies conform to guidelines, titanium dioxide is not acute toxic or chronic toxic to algae, daphnids and fish in so far as no 50% effect level is reached up to the water solubility level, which was determined according to OECD Environmental Health and Safety Publications Series on testing and assessment no. 29 (Guidance document on transformation/dissolution of metals and metal compounds in aqueous media). Brouwers (2009) found the solubility below the level of detection of the analytical method, i.e. < 1 µg/L at pH 6, 7, and 8. Bioaccumulation of titanium species was likewise not observed. Therefore, no classification of target substance titanium oychloride as to its ecotoxicity properties applies.

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