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EC number: 202-764-2
CAS number: 99-54-7
1,2-Dichloro-4-nitrobenzene has no oxidizing properties based on theoretical considerations (Currenta, 2009a) and the non-oxidizing properties of the structural analogue 1,3-dichloro-4-nitrobenzene (Currenta, 2009b).
The experimental study was performed with 1,3 -dichloro-4 -nitrobenzene
which is a structural analogue to 1,2 -dichloro-4 -nitrobenzene. Both
substances consist of one benzene ring, one NO2 -group and two
chlorine-substituents which are directly linked with the respective
aromatic carbon atoms. The difference between these two substances is
merely the position of the chlorine-substituents compared to the NO2
-group. It is assumed that oxidzing properties are caused by the
presence of certain chemical moieties (for example electron-withdrawing
substituents ) rather than their position within the molecule.
This decision is in accordance with the grouping of substances and
read-across approach in Annex XI, 1.5 of the REACH Regulation. The
results of the test accoring to the UN-method O.2 showed no oxidizing
properties of 1,3 -dichloro-4 -nitrobenzene (Currenta, 2009b).
Furthermore, for nitro compounds, the net atomic charge on the Nitrogen
atom of the NO2 group should be a simple indicator of oxidizing
properties. These theoretical consideration included the comparison of
the calculated net atomic charge of 1,2 -dichloro-4 -nitrobenzene with
that of structural analogue having no oxidizing properties. As the
substances with the highest and lowest net atomic charge does not have
oxidizing properties, the test item with an intermediate value should
not have oxidizing properties as well (Currenta, 2009a)
Based on theoretical considerations (Currenta, 2009a) and the
non-oxidizing properties of the structural analogue
1,3-dichloro-4-nitrobenzene (Currenta, 2009b) 1,2-Dichloro-4-nitrobenzene
has not to be classified as oxidizing solid.
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