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

The poorly soluble substance chrome antimony titanium buff rutile is evaluated by comparing the dissolved metal ion levels resulting from the transformation/dissolution test after 7 and 28 days at a loading rate of 1 mg/L with the lowest acute and chronic ecotoxicity reference values (ERVs) as determined for the (soluble) metal ions. Acute and chronic ERVs are based on the lowest EC50/LC50 and NOEC/EC10 values for algae, invertebrates and fish, respectively. The ERVs were obtained from the Metals classification tool (MeClas) database as follows:


 


The acute ERVs of antimony (12.1 mg Sb/L, ECHA disseminated database), trivalent chromium (> 100 mg Cr/L) and titanium (> 100 mg Ti/L) ions are above 1 mg/L and thus a concern for short-term (acute) toxicity was not identified (no classification). According to ECHA Guidance on the Application of the CLP Criteria (Version 5.0, July 2017), “Where the acute ERV for the metal ions of concern is greater than 1 mg/L the metals need not be considered further in the classification scheme for acute hazard.” Furthermore, the metal release in the T/D test at 1 mg/L loading and pH 8, the pH that maximises dissolution, resulted in dissolved antimony and chromium concentrations of 0.766 µg Sb/L and 0.071 µg Cr/L after 7 days, respectively. Due to the limited metal release in the T/D test after 7 days at pH 8 with 1 mg/L loading and the lack of an aquatic hazard potential for antimony, chromium and titanium ions, it can be concluded that the substance chrome antimony titanium buff rutile is not sufficiently soluble to cause short-term toxicity at the level of the acute ERVs (expressed as EC50/LC50).


 


Studies on the acute toxicity of chrome antimony titanium buff rutile to Daphnia magna (BASF AG, 2000), Leuciscus idus (BASF AG, 1988), and Desmodesmus subspicatus (BASF AG, 2000) support this conclusion since effects were not observed at test concentrations ranging from 100 mg/L to 10,000 mg/L (nominal).


 


In accordance with Figure IV.4 “Classification strategy for determining acute aquatic hazard for metal compounds” of ECHA Guidance on the Application of the CLP Criteria (Version 5.0, July 2017) and section 4.1.2.10.2. of Regulation (EC) No 1272/2008, the substance chrome antimony titanium buff rutile is poorly soluble and does not meet classification criteria for acute (short-term) aquatic hazard.


 


Regarding the long-term toxicity, the chronic ERVs of antimony (1.130 mg Sb/L), trivalent chromium and titanium (> 100 mg Ti/L) ions are above 1 mg/L, and a concern for long-term (chronic) toxicity was not identified (no classification). According to ECHA Guidance on the Application of the CLP Criteria (Version 5.0, July 2017), ”Where the chronic ERV for the metal ions of concern corrected for the molecular weight of the compound (further called as chronic ERV compound) is greater than 1 mg/L, the metal compounds need not to be considered further in the classification scheme for long-term hazard.” Furthermore, the metal release in the T/D test at 1 mg/L loading and pH 8, the pH that maximises dissolution resulted in dissolved antimony and chromium concentrations of 1.027 µg Sb/L and 0.050 µg Cr/L after 28 days, respectively. Due to the metal release in the 28 days T/D test at 1 mg/L loading and the lack of an aquatic hazard potential for antimony, chromium and titanium ions, it can be concluded that the substance chrome antimony titanium buff rutile is not sufficiently soluble to cause long-term toxicity at the level of the chronic ERVs (expressed as NOEC/EC10).


 


A study on the chronic toxicity of chrome antimony titanium buff rutile to Desmodesmus subspicatus (BASF AG, 2000)  supports this conclusion since effects were not observed at test concentrations up to 100 mg/L (nominal concentration) and an unbound EC10 of > 100 mg/L (nominal concentration of eluate) was derived.


 


In accordance with Figure IV.5 „Classification strategy for determining long-term aquatic hazard for metal compounds “of ECHA Guidance on the Application of the CLP Criteria (Version 5.0, July 2017) and section 4.1.2.10.2. of Regulation (EC) No 1272/2008, the substance chrome antimony titanium buff rutile is poorly soluble and does not meet classification criteria for chronic (long-term) aquatic hazard.


 


In sum, the substance chrome antimony titanium buff rutile is poorly soluble and does not meet classification criteria of Regulation (EC) No 1272/2008 for acute (short-term) and chronic (long-term) aquatic hazard.