Registration Dossier
Registration Dossier
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EC number: 266-340-9 | CAS number: 66402-68-4 This category encompasses the various chemical substances manufactured in the production of ceramics. For purposes of this category, a ceramic is defined as a crystalline or partially crystalline, inorganic, non-metallic, usually opaque substance consisting principally of combinations of inorganic oxides of aluminum, calcium, chromium, iron, magnesium, silicon, titanium, or zirconium which conventionally is formed first by fusion or sintering at very high temperatures, then by cooling, generally resulting in a rigid, brittle monophase or multiphase structure. (Those ceramics which are produced by heating inorganic glass, thereby changing its physical structure from amorphous to crystalline but not its chemical identity are not included in this definition.) This category consists of chemical substances other than by-products or impurities which are formed during the production of various ceramics and concurrently incorporated into a ceramic mixture. Its composition may contain any one or a combination of these substances. Trace amounts of oxides and other substances may be present. The following representative elements are principally present as oxides but may also be present as borides, carbides, chlorides, fluorides, nitrides, silicides, or sulfides in multiple oxidation states, or in more complex compounds.@Aluminum@Lithium@Barium@Magnesium@Beryllium@Manganese@Boron@Phosphorus@Cadmium@Potassium@Calcium@Silicon@Carbon@Sodium@Cerium@Thorium@Cesium@Tin@Chromium@Titanium@Cobalt@Uranium@Copper@Yttrium@Hafnium@Zinc@Iron@Zirconium
Water solubility
Administrative data
Link to relevant study record(s)
Description of key information
Ca: 291-365 mg/L
Al: 324- 390 mg/L
pH: 12.01-12.51
T: 20 °C,
measured at the maximum of conductivity, 0.03 - 1.83 h after adding the test item to water.
Key value for chemical safety assessment
Additional information
The results refer to the maximum of measured conductivity (determined by ICP-OES). Calcium and Aluminium are the only significantly measured elements in solution in spite of the more or less significant amount of other elements in the substance. The executed methodology differs from the usual OECD 105 procedure used to determine solubility of pure substances stable in water. Indeed, the substance has a complex mineralogy and reacts with water (dissolution – precipitation process) and not only dissolve. At long term solubility of the substance will be at the same level than Al(OH)3.
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