Page 25 - CITDBooklet

Guide on the application of REACH Regulation

Kaolin [1332-58-7]
Is composed of kaolinite, potassium aluminium silicate, feldspar and quartz.
Also need morphology and mineral composition to identify the substance unequivocally.
Apatite (Ca5(PO4)3(OH,F,Cl).
Is composed of hydroxylapatite (OH-), fluorapatite (F-) and chlorapatite (Cl-) based on
the ions respectively in the crystal lattice.
Naming
Follow principle of mono-constituent or multi-constituent substances.
For inorganic minerals, the minerological names can be used.
Identifiers
Follow principle of mono-constituent or multi-constituent substances.
Other specific main identifiers may be in the form of Elemental composition, crystalline
structure, IR, X-Ray diffraction, Swelling index, cation exchange capacity.
Analytical information
Spectral data, plus data mentioned above

3.2.4 Unknown or Variable composition, Complex reaction products or Biological materials
(UVCB):

■ Cannot be sufficiently identified by chemical composition
■ Number of constituents is relatively large and/or
■ Composition is to a significant extent unknown and/or
■ Variability of composition is relatively large or poorly predictable
■ As a consequence other type of information for identification is necessary
When a substance is declared as UVCB the other identifiers are
■ “process related” or
■ “source related”
Any significant change is “source” or “process” would lead to fresh registration
requirements of that substance.
On the other hand if a substance is defined as a “ multi-constituent substance”
then a substance may be derived from different sources and/or different process as
long as the final composition of final substance stays within specified range no fresh
registration would be required.
Chemical composition and the identity of the constituents should be given as far as
known
Naming
Name of UVCB is a combination of source (1st) and process (2nd) Source biological
A substance derived from biological sources is identified by the name of genus, species and
family

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