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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Particle size distribution (Granulometry)

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Description of key information

Zinc iron chromite brown spinel: MMAD=89.90µm, GSD=8.08
Zinc iron chromite brown spinel: D50 = 1.4 µm

Additional information

Total Dustiness (airborne fraction): 23.51mg/g (experimental results, DMT Report).

Mass median aerodynamic diamater of airborne fraction: MMAD=89.90µm (distribution fitted to cascade impactor data). Geometric standard deviation of MMAD: GSD=8.08

Fractional deposition in human respiratory tract (MPPD model, based on calculated MMAD):

Head (ET): 35.0%

Tracheobronchial (TB): 0.3%

Pulmonary (PU): 0.7%

Particle size analysis by laser diffraction

d50 = 1.4 µm

d90 = 2.8 µm

d10 = 0.7 µm

(All values were calculated assuming that the particles are spherical)