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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Endpoint summary

Administrative data

Description of key information

Additional information

For four endpoints (appearance, melting point, density and water solubility) data on the physical and chemical properties of lead selenide was taken from the handbook CRC (2008). Waivers are proposed for boiling point, vapour pressure, partition coefficient, surface tension, flash point, explosiveness, oxidising properties, stability in organic solvents, dissociation constant and viscosity, as well as for pyrophoric properties and flammability in contact with water.

No data is available for particle size distribution, auto flammability, and flammability (in air)


Summary of results:



Substance type

inorganic compound

Appearance/physical state/colour

grey cubic crystals under atmospheric pressure and room temperature

Melting/freezing point

1078 °C

Boiling point (at 1013 hPa)

Not required since melting point is above 300 °C

Density at 20C

Relative density is 8.1 at room temperature

Particle size distribution

No data

Vapour pressure

Not required since melting point is above 300 °C

Partition Coefficient

Not required for inorganic substances

Water solubility at 20C

insoluble (<0.1 mg/L)

Surface Tension at 25C

Not expected to be surface active (waiving)

Flash point

Not required for inorganic solid substances

Self ignition temperature

no self-ignition expected


No data on flammability (in air); pyrophoric properties and flammability in contact with water not expected


Not expected to possess explosive properties

Oxidising properties

Not expected to possess oxidising properties

Stability in organic solvents and identity of relevant degradation products

Not considered critical for an inorganic substance

Dissociation constant

No relevant functional groups, thus considered not required


Not required for solids