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EC number: 269-075-7
CAS number: 68187-15-5
An inorganic pigment that is the reaction product of high temperature calcination in which praseodymium (III) oxide, praseodymium (IV) oxide, silicon oxide, and zirconium (IV) oxide in varying amounts are homogeneously and ionically interdiffused to form a crystalline matrix of zircon. Its composition may include any one or a combination of the modifiers alkali or alkaline earth halides.
Zirconium praseodymium yellow zircon has no oxidising properties, it does not contain a surplus of oxygen or any structural groups known to be correlated with a tendency to react exothermically with combustible material.
According to Regulation (EC) No 1907/2006,
Annex VII, Section 7.13, Column 2, the study does not need to be
conducted if the substance is incapable of reacting exothermically with
combustible materials, for example on the basis of the chemical
structure. This pigment does not contain a surplus of oxygen or any
structural groups that have a tendency to react exothermally with
combustible material. Derogation from testing is hereby applied for.
Zirconium praseodymium yellow zircon does not need to be classified according to CLP Regulation (EC) No 1272/2008 since oxidising properties are considered non-relevant based on the chemical structure.
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