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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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


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Administrative data

Link to relevant study record(s)

Description of key information

The procedure was performed according to the Method A.3 Relative density, Council Regulation (EC) No.440/2008, Published in O.J. L 142, 2008. The pycnometer method according to the standard ČSN EN ISO 1183-1, part B was chosen for the measurement. 
FBC Ash (both Fly Ash and Bottom Ash) is produced inside the boiler. FBC Fly Ash is carried out along with the flue gas and leaves the furnace in the upper part of the boiler. It is mostly collected in electrostatic precipitators or mechanically by separation in fabric filters. FBC Bottom Ash is collected at the bottom of the boiler and is representing the coarser part of the ash. FBC Fly Ash and Bottom Ash may be mixed and extracted together as FBC Ash.

Key value for chemical safety assessment

Relative density at 20C:

Additional information

The density was measured for Fly Ash and Bottom Ash separately because it is collected in different ways due to its particle size.

Relative density of the test item, Fluidized Bed Combustion (FBC) Fly Ash, is 2.455. Standard uncertainty is 0.033.

Relative density of test item, Fluidized Bed Combustion (FBC) Bottom Ash, is 2.86. Standard uncertainty is 0.22.

Relative density of FBC Ash is from 2.455 to 2.86. Average value of relative density is 2,658.