Reaction mass of Limestone and calcium fluoride and calcium sulfate

Oxidising properties

Administrative data

Endpoint:

oxidising solids

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because the substance is incapable of reacting exothermically with combustible materials

Justification for type of information:

JUSTIFICATION FOR DATA WAIVING

In accordance with column 2 of REACh Annex VII 7.13, the study 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.

As presented under Section 1, the substance is a Reaction mass of three inorganic calcium salts (fluoride, sulfate, and carbonate, the last being also considered as inorganic, though it contains carbon).

According to Regulation (EC) N°1272/2008 (CLP) criteria (Annex I §2.13.4./2.14.4., or as listed in the ECHA endpoint specific guidance on information requirements (R.7a, v5.0, December 2016, §R.7.1.13)), the constituents contain electronegative atoms, oxygen and fluorine, but these elements are always linked to calcium, which is of low electronegativity. In carbonate, O is also bonded to carbon, which is of no concern. In sulfate, O is also bonded to sulfur, which is an electronegative element, but inorganic sulphates are not known to have oxidising properties (cf Bretherick's handbook of Reactive Chemical Hazards). Moreover, as calcium sulfate is classified as ‘No contribution to fire’ for construction products, where combustible materials (eg wwod) can also be present, it looks very unlikely that it would have oxidising potential. In addition, none of the constituents is identified as hazardous in the Bretherick's handbook.

Then oxidising properties are unlikely, and the classification procedure shall not apply, no further testing is required.
The substance shall NOT be classified as oxidising solid.