Registration Dossier
Registration Dossier
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EC number: 235-759-9 | CAS number: 12656-85-8 This substance is identified in the Colour Index by Colour Index Constitution Number, C.I. 77605.
Particle size distribution (Granulometry)
Administrative data
Link to relevant study record(s)
Description of key information
Mean Particle Size:
C.I. Pigment Yellow 34: 17.3-24.6 µm
C.I. Pigment Red 104: 16.1-22.3 µm
Dustiness:
For C.I. Pigment Red 104, the respirable fraction of the inhalable dustiness mass fraction is 1.2%
Additional information
Particle size distribution:
The particle size distribution of C.I. Pigment Yellow 34 and C.I. Pigment Red 104 was measured using a Coulter® LS Particle Size Analyser. Four different samples from each pigment were measured. The mean particle size ranged from 17.3-24.6 µm for C.I. Pigment Yellow 34 and from 16.1-22.3 µm for C.I. Pigment Red 104, under the conditions of this test.
Particle size distribution:
Pigment sample |
Mean particle size in μm |
|||
|
%<D10 |
%<D50 |
%<D90 |
Mean (100%) |
C.I. Pigment Yellow 34 |
1.7 |
17.5 |
44.1 |
20.2 |
C.I. Pigment Red 104 |
1.8 |
12.7 |
43.1 |
18.2 |
Dustiness testing:
The dustiness of DCC Orange 1629 (Regular Pigment Red 104) was investigated according to EN 15051 using the rotating drum method. The dustiness results of sample DCC Orange 1629 (Regular Pigment Red 104) are as follows (at 21ºC and RH of 44 +/-3%):
The average inhalable dustiness mass fraction is 2201 mg kg-1 and is classified as moderate.
The average thoracic dustiness mass fraction is 304 mg kg-1 and is classified as moderate.
The average respirable dustiness mass fraction is 27 mg kg-1 and is classified as low.
For C.I. Pigment Red 104, the respirable fraction of the inhalable dustiness mass fraction is 27/2201*100% = 1.2%
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