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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

The majority of data on the physical and chemical properties of zinc selenite was provided by new testing in accordance with GLP: density, particle size (and dustiness testing), water solubility, auto flammability, flammability, pyrophoric properties, and oxidising properties.


Additional available data on the physical and chemical properties of zinc selenite was taken from public domain reviews and handbooks including the CRC (2008), GESTIS database (2009) or MSDS.


Waivers are proposed for boiling point, vapour pressure, partition coefficient, surface tension, flash point, explosiveness, stability in organic solvents, dissociation constant and viscosity, as well as flammability in contact with water.


 


Summary of results:


















































































Property



Value



Substance type



inorganic compound



Appearance/physical state/colour



white odourless inorganic powder under atmospheric pressure and room temperature



Melting/freezing point



621 °C



Boiling point (at 1013 hPa)



Not required if melting point is above 300 °C



Density at 20C



Relative density is 4.69 at room temperature



Particle size distribution



L50: 17.4 µm  (laser diffraction, equivalent to OECD 110)


MMAD (bimodal lognormal distribution ): 13.13 µm (23.4 %), 26.17 µm (76.6 %)



Vapour pressure



Not required if melting point is above 300 °C



Partition Coefficient



Not required for inorganic substances



Water solubility at 20C



16.00 ± 2.03 mg/L



Surface Tension at 25C



Not expected to be surface active



Flash point



Not required for inorganic solid substances



Self ignition temperature



no self-ignition was observed up to 430 °C



Flammability



Non-flammable and no pyrophoric properties;  


flammability in contact with water not expected



Explosiveness



Not expected to possess explosive properties



Oxidising properties



No oxidizing 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



Viscosity



Not required for solids