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Particle size distribution (Granulometry)

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Description of key information

Key study:- Tarran (2012), EC TGD (June 199) ‘Particle Size Distribution, Fibre Length and Diameter Distribution', OECD Guideline 110 
Cumulative percentage:
Proportion of the test material having an inhalable particle size of <100 µm = 15.2 %
Proportion of the test material having a thoracic particle size of <10.0 µm = 1.21 %
Proportion of the test material having a respirable particle size of <5.5 µm = 0.40 %

Additional information

The particle size distribution was investigating using a method based on a procedure designed to be compatible with that given in `Particle Size Distribution, Fibre Length and Diameter Distribution', June 1996 European Commission technical guidance document, which satisfies the requirements of OECD Guideline 110, 12 May 1981.

Sieving apparatus was used in a screening test to investigate particle size of 100 µm. A cascade impactor was then employed to investigate particles in the size range of 0.3 to 10 µm.

A reliability score of 1 was assigned, in accordance with the criteria for assigning data quality in line with the principles described by Klimisch (1997).

Particle size data (cumulative percentage) acquired for the test material is:

Proportion of the test material having an inhalable particle size of <100 µm = 15.2 %

Proportion of the test material having a thoracic particle size of <10.0 µm = 1.21 %

Proportion of the test material having a respirable particle size of <5.5 µm = 0.40 %

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