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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Physical & Chemical properties

Particle size distribution (Granulometry)

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Description of key information

The proportion of slags, dore production less than 100µm has been determined to be 14.7%. 
A particle size distribution study for slags, production of precious metal containing materials other than dore indicated a D50 of 138 µm and a D80 of 544 µm.

Additional information

The study for slags, dore production by Harlan (2010) is GLP compliant and follows a standard guideline. It is considered reliable and acceptable for use as a key study.


The particle size distribution of slags, production of precious metal containing materials other than dorewas determined in an experimental study using a sieving system (Outotec 2010). The study is not GLP, however the study followed sound scientific principles, was well documented and is considered suitable for use for this endpoint.