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Physical & Chemical properties

Oxidising properties

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Description of key information

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). 

Key value for chemical safety assessment

Oxidising properties:
no

Additional information

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)

Justification for classification or non-classification

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.