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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Oxidising properties

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Description of key information

DNNSA has no oxidising properties.

Key value for chemical safety assessment

Oxidising properties:
no

Additional information

Assessment of the chemical structure and composition of di C8-C10, branched, C9 rich, alkylnaphthalene sulphonic acid (DNNSA) indicates that the material does not contain groups that act as oxidising agents. The oxygen atoms that are present in the molecular structure are chemically bonded to hydrogen or sulphur. Thus, di C8-C10, branched, C9 rich, alkylnaphthalene sulphonic acid (DNNSA) has no oxidising properties.

Justification for classification or non-classification

The substance is not considered oxidising according to the criteria given in test method A17, Oxidising Properties (Solids), section 1.1, paragraph 2 (examination of the chemical structure) in Regulation (EC) No. 440/2008. As a result di C8-C10, branched, C9 rich, alkylnaphthalene sulphonic acid (DNNSA) does not meet the criteria for classification under Directive 67/548/EEC, as amended for the 28th time in Directive 2001/59/EC, Annex VI, 2.2.2.

According to the additional criteria for classification under Regulation (EC) No. 1272/2008, Annex I, part 2, 2.14.4, if the molecule does not contain oxygen, fluorine or chlorine (in oxidation state other than -1), or contains these atoms only bonded to carbon or hydrogen, then testing is not required. As a result, this substance does not meet the criteria for classification under Regulation (EC) No. 1272/2008.