Registration Dossier
Registration Dossier
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EC number: 432-240-0 | CAS number: 12056-51-8
Endpoint summary
Administrative data
Description of key information
Additional information
Phototransformation in air, water and soil does not need to be examined at this level of registration.
In accordance with column 2 of 7.6 in Regulation (No) 1907/2006 (REACH) Annex VIII, study for hydrolysis as a function of pH does not need to be conducted due to the low water solubility of the test substance.
In accordance with column 2 of 9.2.1.1 in Regulation (No) 1907/2006 (REACH) Annex VII, ready biodegradability test does not need to be conducted as the substance is inorganic.
Simulation tests in soil or sediment are unlikely to provide further evidence on potential ecotoxicity of the substance for the following reasons:
The substance is stable in the environment, i.e. transformation or dissociation is not probable. (The substance also has a very low water solubility of less than 2.4E-04g/l, and even when placed in boiling water for a period of 18 weeks there is no dissolution of potassium.
(Filler Society of Japan (1994) Application Encyclopeadia of Fillers; Taiseisha; p131, Table 4).
It will behave like other stable minerals in the environment, such as many silicates or metal oxides, which will undergo very slow transformation by geological processes.
The substance consists of potassium, titanium and oxygen, all of which are abundant in the environment. Organisms can cope with these elements and have developed strategies to control the level of these elements in their bodies. However, since the substance is stable under environmental conditions, exposure to the elements as a result of environmental release and subsequent dissociation of the substance, is unlikely. Even if the substance partitioned into the soild or sediment, its' presence would not significantly alter the properties of these environmental compartments.
Like other environmentallly stable minerals, the substance when released to the environment will not be bioavailable and thus will not become part of any biological system.
For inorganic crystalline substances such as the substance, only dissolved ions are available for potential uptake. The substance itself is stable in the environment i.e. transformation or dissociation is not probable, which appears also from the available aquatic toxicity tests. Therefore, the substance when released to the environment will not be bioavailable and thus will not become part of any biological system.
It follows therefore that the substance is unlikely to pose a risk to predatory organisms or humans exposed via the environment based on the absence of food web biomagnification.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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