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Physical & Chemical properties

Particle size distribution (Granulometry)

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Description of key information

Laser diffraction data for the Lead Registrant's copper (II) sulphide show the following volume-rated particle size distribution: D(v,0.1) 5.10 µm; D (v,0.5) 25.53 µm; D(v,0.9) 48.27 µm.  The corresponding number-based distribution is as follows: D(n,0.1) 1.27 µm; D (n,0.5) 1.85 µm; D(n,0.9) 3.73 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 (II) sulphide 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 (II) sulphide with the following volume-rated particle size distribution: D(v, 0.1) 5.10, D(v,0.5) 25.53 and D(v,0.9) 48.27. Values for the number-rated distribution were determined to be D(n,0.1) 1.27, D(n, 0.5) 1.85 and D(n,0.9) 3.73.

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 (II) sulphide corresponding to this specification are able to refer to the Lead Registrant's granulometry data for the purpose of REACH registration.

The PSD data used to address this endpoint was generated using isolated copper (II) sulphide manufactured by Tribotecc and is considered to be representative of material produced by the industry. As such, these data can also be utilised by joint registrants that do not isolate the material e.g. when it is produced in-situ during catalyst manufacture.