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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Diss Factsheets

Physical & Chemical properties

Particle size distribution (Granulometry)

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Administrative data

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Description of key information

The results indicated that 0.1% w/w of Chlorendic anhydride was smaller than 10 μm.

Additional information

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 particles that passes the larynx). It has been shown 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 particles that reaches the alveoli) It has been shown that 50% of particles with an aerodynamic diameter of 4 μm belong to the respirable fraction

This shows that chlorendic anhydride does not contain significant content of thoracic or respirable fractions but that 31.2% represent an inhalable fraction.