Registration Dossier

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Zirconium iron pink zircon (CAS 68412-79-3) is an inorganic, brick red, odourless powder.

- Melting point > 1000 °C

- relative density: 4.74.

- Particle size distribution: d10 = 1.3 µm, d50 = 2.5 µm, d90 = 4.7 µm

- Dustiness:

total: 13.3 mg/g

MMAD1= 4.99 µm, GSD1= 1.37

MMAD2 = 10.25 µm, GSD2= 5.80

Fractional deposition in human respiratory tract: Head (ET): 66.7 %, Tracheobronchial (TB): 2.0 %, Pulmonary (PU): 5.9 %

- The transformation/dissolution

Full test 7 days at 100 mg/L and pH 6: < LOD (0.5) µg Fe and Zr/L

Full test 7 days at 100 mg/L and pH 8: 2.4 µg Fe/L and 2.17 µg Zr/L

Full test 28 days at 1 mg/L and pH 8: < LOD (0.5) µg Fe and Zr/L

Additional information