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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Administrative data

Description of key information

The test substance (manganese alumina pink corundum, CAS 68186-99-2) is a pink, odourless powder.

- Melting point: >1000 °C.

- relative density: 4.01.

-Particle size distribution: D10: 1.0 µm, D50: 2.2 µm, D90: 4.3 µm

- Dustiness:

Total dustiness: 55.81 mg/g

MMAD1 = 3.96 µm (28.9 %) , MMAD2 = 23.75 µm (71.1 %)

Geometric standard deviation of MMAD: GSD1 = 1.24, GSD 2 = 5.98.

Fractional deposition in human respiratory tract: Head (ET): 55.8 %, Tracheobronchial (TB): 1.5 %, Pulmonary (PU): 3.6 %


-Transformation/dissolution, pH6 (pH that maximises dissolution)

The dissolved concentrations of aluminium and manganese at a 100 mg/l loading after 7 days were below LOD (< 0.01µg/L) for aluminium and 1.48 µg/L for manganese.

The dissolved concentrations of aluminium at a 1 mg/l loading after 7 and 28 days were 0.29 µg/L and 0.42 µg/L, respectively.

The dissolved concentrations of manganese at a 1 mg/l loading after 7 and 28 days were 10.66 µg/L and 8.91 µg/L, respectively.

Additional information