Registration Dossier

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

Appearance

Sodium permanganate (technical) is a dark violet odourless powder (Dobber, 2009).

Melting point

The melting point of sodium permanganate is 170°C (Lide, 2006).

Boiling point

The test substance decomposes at melting point. Consequently, boiling point cannot be determined.

Density

The density of sodium permanganate trihydrate is 2.47 g/cm3 (Lide, 2006).

Granulometry

Not applicable as the substance is marketed or used in a non solid or granular form.

Vapour pressure

Sodium permanganate is an inorganic ionic salt. Ionic solids are composed of separate ions bound together in a high energy crystal lattice by ionic forces. In order to overcome the crystal lattice energy and change the substance from the solid into the gaseous form, considerable energy is required and this would require high temperatures. The resulting gas phase would consist of the separate ionic constituents. Sodium permanganate decomposes at a relatively low temperature and it can therefore be concluded that the vapour pressure of the solid is not measureable without decomposing the substance.   

Partition coefficient

The test substance is inorganic.

Water solubility

Water solubility of sodium permanganate at 20 °C is 1440 g/L (Lide, 2006).

Surface tension

The test substance is a solid.

Flash point

The test substance is inorganic.

Autoflammability

The test substance decomposes at melting point. Consequently, auto flammability cannot be determined.

Flammability

The test item could not be ignited with a flame because it decomposed during the heating. The colour of the test item changed from dark violet to grayish. It can be concluded that the test item is not a highly flammable solid (Dobber, 2009).

Explosiveness

Sodium permanganate does not present a danger of explosion according to criteria of EEC A.14 method (Salacinski & Buchalik).

Oxidising properties

Sodium permanganate is classified as oxidising.

Stability in organic solvents

The study does not need to be conducted because the substance is inorganic.

Dissociation constant

This data requirement is not applicable to an inorganic substance.

Viscosity

This data requirement is not applicable to an inorganic substance.