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Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information



Substance type

inorganic compound

Appearance/physical state/colour

grey-brown coloured solid

Melting/freezing point

>500 °C

Boiling point (at 1013 hPa)

>500 °C

Density at 20C

Relative density is 1.77 at room temperature

Particle size distribution

L50 = 700 µm

Vapour pressure

study does not need to be conducted as the melting point is above 300°C

Partition Coefficient

Not required, inorganic substance

Water solubility at 30C

0.1 g/L at 30.0 °C (loading 20 g)

Surface Tension at 25C

Not expected to be surface active

Flash point

Not required, inorganic substance

Self ignition temperature

Not self heating, no self ignition up to 475 °C


Not highly flammable; No pyrophoric properties; 

flammability in contact with water not expected


Not expected to possess explosive properties

Oxidising properties

Not expected to possess oxidizing properties

Stability in organic solvents and identity of relevant degradation products

Not considered critical for this inorganic substance

Dissociation constant

No relevant functional groups, thus considered not relevant


Not required, solid substance