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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

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Physical & Chemical properties

Particle size distribution (Granulometry)

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Description of key information

MMD = 29.2 µm

Additional information

The particle size distribution of the test item was determined according to internationally accepted guidelines: ISO 13320, OECD TG 110 and EPA OCSPP 830.7520.

The density values were the follows:

D10 = 7.2 µm, D50, median particle size = 29.2 µm and D90 = 87.6 µm.

The CEN document, EN 481 ‘Workplace Atmospheres – size fraction definitions for measurement of airborne particles’ (CEN 1993) provides definitions of the inhalable, thoracic and respirable size fractions, and target specifications (conventions) for sampling instruments to measure these fractions. The current standard defines sampling conventions for particle size fractions which are to be used in assessing the possible health effects resulting from inhalation of airborne particles in the workplace. The different particle sizes defined in EN 481 are: - inhalable fraction (the mass fraction of particles that can be inhaled by nose and mouth. Particles >100 μm are not included in the inhalable convention; - thoracic fraction (the mass fraction of the inhaled particles that passes the larynx). The convention for thoracic fraction sets that 50% of the particles in air with an aerodynamic diameter of 10 μm belong to the thoracic fraction; - respirable fraction (the mass fraction of the inhaled particles that reaches the alveoli). The convention for respirable fraction sets that 50% of particles with an aerodynamic diameter of 4 μm belong to the respirable fraction.)

Between 0.5 -1 % in volume of the test item has a particle size <= 4 µm (respirable fraction (the mass fraction of particles that reaches the alveoli).