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Physical & Chemical properties

Particle size distribution (Granulometry)

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Description of key information

The granulometry of a representative sample of zinc dilaurate is summarized as follows (Schenkelberg, 2009):
D10 = 4.3µm
D50 = 16.7µm
D90 = 34.8µm
Dustiness (Parr, 2012; Grewe, 2012):
total: 241.82 mg/g
MMAD = 8.5 µm, GSD = 4.36
Estimation of desposited dust fractions in the human respiratory tract:
Head (ET): 60.2%
Tracheobronchial (TB): 1.8%
Pulmonary (PU): 5.6%

Additional information

The D10, D50 and D90 of the particle size distribution of a representative test material are 4.3µm, 16.7µm and 34.8µm, respectively. The total dustiness (airborne fraction) was determined according to method DIN 55992-1:2006 using a modified Heubach dust meter. Total dustiness is 241.82 mg/g. MMAD of the total dustiness fraction is 8.5 µm (GSD 4.36). These were used as distribution parameters for the MPPD model enabling an estimation of deposited dust fractions in the human respiratory tract: These fractions were estimated as follows:

Head (ET): 60.2%

Tracheobronchial (TB): 1.8%

Pulmonary (PU): 5.6%