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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Link to relevant study record(s)

Description of key information

Mass Median Diameter: 22.49 µm (BS ISO 13320-1: 1999, laser diffraction analysis)

Additional information

The substance 2-hexyldecanoic acid [4-(6-tert-butyl-7-chloro-1H-pyrazolo[1,5-b][1,2,4]triazol-2-yl)phenylcarbamoyl]methylester (UM-235) was observed to be a fine, off-white, free flowing powder by standard visual observation. Microscopic inspection revealed that the sample was made up of single crystalline particles which appeared to be sharp edged and irregularly shaped.


18.12% by volume of sample was seen to be ≤ 10.00 µm.