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 dihydroxide show the following volume-rated particle size distribution: L10 D(v,0.1) 1.40 µm; L50 D (v,0.5) 5.52 µm; L90 D(v,0.9) 13.4 µm.  The corresponding number-based distribution is as follows: L10 D(n,0.1) 0.200 µm; L50 D (n,0.5) 0.409 µm; L90 D(n,0.9) 1.05 µm.  Based on the results from the number distribution, the material is not considered to fall under the EC’s recommended definition of nanomaterial (50% < 100 nm based on particle number).  Joint registrants that produce or import copper dihydroxide corresponding to this specification are able to refer to the Lead Registrant's granulometry data for the purpose of REACH registration.

Additional information

The Lead Registrant produces copper dihydroxide with the following volume-rated particle size distribution: L10 D(v, 0.1) 1.40, L50 D(v,0.5) 5.52 and L90 D(v,0.9) 13.4. Values for the number-rated distribution were determined to be L10 D(n,0.1) 0.200, L50 D(n, 0.5) 0.409 and L90 D(n,0.9) 1.05.

Based on the results from the number distribution, the material is not considered to fall under the EC’s recommended definition of nanomaterial (50% < 100 nm based on particle number).

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