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EC number: 701-200-7
CAS number: -
‘Reaction mass of potassium aluminium tetrafluoride and tripotassium
hexafluoroaluminate’ is an inorganic white odourless powder with a high
melting point (range of 560 – 600˚C). The target substance [reaction
mass of potassium aluminium tetrafluoride and tripotassium
hexafluoroaluminate] is similar in terms of composition to source
substance 1 (SS1), aluminium potassium fluoride. Both substances are
multi-constituent substances with the same major (~70%) component
(KAlF4). The major constituent, other constituents and impurities
present in both of these substances are all potassium fluoroaluminate
salts with varying ionic structures and levels of hydration.
read across justification can be found in IUCLID section 13.2.
potassium fluoride is an inorganic white crystalline solid with melting
point above 550 °C (NOTOX, 2010). The relative density of aluminium
potassium fluoride is 2.94 at 20˚C (NOTOX, 2010). The water solubility
of aluminium potassium fluoride is 4.57 g/L at 20 ˚C and pH = 5.8,
measured by determining the concentration of aluminium ions in solution
size distribution measurements were performed on aluminium potassium
fluoride using laser diffraction method, resulting in the following
values: D10 = 0.92 μm, D50 = 3.01 μm, D90 = 11.63 μm (Solvay Fluor GmbH,
the substance is a solid with a melting point well above 300 ˚C, in
accordance with Column 2 of REACH Annex VII, studies on boiling point
and vapour pressure do not need to be conducted.
studies on octanol/water partition coefficient, flash point and the
stability in organic solvents do not need to be conducted as the
substance is inorganic. Surface activity is not predicted based on the
substance structure; neither is it a desired substance property. As the
substance is a solid, viscosity is not a relevant property. The
substance is not expected to be explosive as it does not contain
chemical groups which are associated with explosive properties. The
performance of the tests on auto-ignition temperature and flammability
is considered to be scientifically unjustified in accordance with Annex
XI of REACH, as the substance is incapable of reaction with oxygen due
to the fact that metal ions are already present in the highest possible
oxidation state, and fluorine, being the most electronegative element,
cannot be oxidised by oxygen. Water reactivity and pyrophoric properties
are not expected for the substance based on the experience in handling
the substance. In addition, as the substance is considered to be
incapable of reacting exothermically with combustible materials based on
its chemical structure, oxidising properties are not expected.
performance of the study on dissociation constant is considered to be
scientifically unjustified in accordance with REACH Annex XI, as,
according to Chapter R.7.1.17 of REACH Guidance on information
requirements and chemical safety assessment, this property is important
for ionisable organic substances. As the substance is an inorganic salt,
it is expected to dissociate fully into the respective cation and anion
in aqueous solution. Possible dissociation of fluoroaluminate moiety,
although it may occur upon dissolution, is considered to be irrelevant
for this endpoint.
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.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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