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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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 approximate median particle sizes L50, L90, and L10 of dicumyl peroxide are 1700, 900, and 6200 µm, respectively. These data indicate that the fraction of particles of a size less than 100 µm is insignificant (only 0.25 % < 500 µm), demonstrating that a significant amount of inhalable particles need not be expected.

Additional information

Test was performed according to OECD guideline 110 ("Particle Size Distribution/Fibre Length and Diameter Distributions") and CIPAC MT 59: Sieve analysis.