Registration Dossier

Physical & Chemical properties

Particle size distribution (Granulometry)

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

Laser diffraction data for the Lead Registrant's copper oxide show the following ranges of volume-rated particle size distributions: D(v,0.1) 2.68 - 24.03 µm; D(v,0.5) 18.73 - 89.6 µm; D(v,0.9) 46.83 - 899.3 µm.  The ranges of number-rated particle size distributions is as follows: D(n,0.1) 0.157 - 0.684 µm; D(n,0.5) 0.220 - 0.943 µm; D(n,0.9) 0.457 - 2.23 µm.  None of the grades would fall under the category of nanomaterial (50% < 0.1 µm, based on particle number).  Joint registrants that produce or import copper oxide corresponding to this specifiction are able to refer to the Lead Registrant's granulometry data for the purpose of REACH registration.

Additional information

The Lead Registrant produces three grades of copper oxide with the following volume-rated and number-rated particle size distributions:

Regular Grade Copper Oxide

Volume-rated distribution: D(v,0.1) 24.03 µm; D(v,0.5) 89.6 µm; D(v,0.9) 899.3 µm.

Number-rated distribution: D(n,0.1) 0.684 µm; D(n,0.5) 0.943 µm; D(n,0.1) 2.23 µm.

Milled Grade Copper Oxide

Volume-rated distribution: D(v,0.1) 8.55 µm; D(v,0.5) 39.0 µm; D(v,0.9) 350.2 µm.

Number-rated distribution: D(n,0.1) 0.277 µm; D(n,0.5) 0.381 µm; D(n,0.1) 0.767µm.

Fine Grade Copper Oxide

Volume-rated distribution: D(v,0.1) 2.68 µm; D(v,0.5) 18.73 µm; D(v,0.9) 46.83 µm.

Number-rated distribution: D(n,0.1) 0.157 µm; D(n,0.5) 0.220 µm; D(n,0.1) 0.457 µm.

Based on the results from the number distributions, none of the tested grades would fall under the category of nanomaterial (50% < 0.1 µm, based on particle number).

Ranges for the volume-based distributions across all grades were as follows: D(v,0.1) 2.68 - 24.03 µm; D(v,0.5) 18.73 - 89.6 µm; D(v,0.9) 46.83 - 899.3 µm.

Ranges for the number-based distributions across all grades were as follows: D(n,0.1) 0.157 - 0.684 µm; D(n,0.5) 0.220 - 0.943 µm; D(n,0.9) 0.457 - 2.23 µm.

Joint registrants that produce or import copper oxide corresponding to this specifiction are able to refer to the Lead Registrant's granulometry data for the purpose of REACH registration.