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Physical & Chemical properties

Oxidising properties

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Description of key information

 Oxidising: no (Expert judgement/Prediction based on molecular structure) 

Key value for chemical safety assessment

Oxidising properties:
no

Additional information

In accordance with Annex VII, Section 7.13, Column 2 of Regulation (EC) No. 1907/2006 (REACH), a study for oxidising properties 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 (e.g. organic substances not containing oxygen or halogen atoms and these elements are not chemically bonded to nitrogen or oxygen, or inorganic substances not containing oxygen or halogen atoms). In accordance with EU Method A.17 Oxidising Properties (solids) of Commission Regulation (EC) No. 448/2008, this test need not be performed when examination of the structural formula establishes beyond reasonable doubt that the substance is incapable of reacting exothermically with a combustible material. The structure of the substance has been assessed for chemical groups that would imply oxidising properties. Examples of such groups are nitrates, metal oxides, hypofluorites, difluoroaminopolynitroaryls, perchlorates, bromates and iodines as described in Brethericks’ Handbook of Reactive Chemical Hazards, 4th Edition, butterworths, London, 1990. It is concluded that the substance magnesium hydrogenorthophosphate does not have any functional groups that would imply oxidising properties. Therefore, testing for oxidising properties does not need to be conducted.

Justification for classification or non-classification

Based on assessment of the molecular structure (presence of chemical groups associated with oxidising properties) and expert judgement, the substance is considered to be not oxidising for the purpose of classification and labelling according to Regulation (EC) No. 1272/2008 (CLP).