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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

The particle size parameters for Allantoin are:  D10 1.5 ± 0.1 µm; D50 8.8 ± 0.8 µm; D90 26.7 ± 1.5 µm
Fraction less than 1 µ 8.4 ± 0.8 vol%; Fraction less than 4 µ 24.7 ± 1.5 vol%; Fraction less than 10 µ 56.1 ± 3.6 vol%; Fraction less than 100 µ 98.0 ± 0.5 vol%.

Additional information

A scientifically valid procedure was used to determine the particle size of Allantoin by laser diffraction. Granulometry was assessed according to ISO 13320; EN 481. The evaluation was done according to the Fraunhofer theory, yielding a conservative estimate.