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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

The MMAD (Mass Median Aerodynamic Diameter < 100 μm) of zinc, 5,5'-azobis-2,4,6(1H,3H,5H)-pyrimidinetrione complexes and melamine has a value fof 5.33 μm as spherical particles.

Additional information

According to OECD guideline 110 the particle size distribution of zinc, 5,5'-azobis-2,4,6(1H,3H,5H)-pyrimidinetrione complexes and melamine was determined by scanning electron microscopy method for the sieved fraction (< 100 µm, 14.22 % of total sample) and presented on the basis of calculated mass fractions. The median diameter was 5.33 µm with two main fractions of 6.87 and 92.66 % distributing in the range of 4 -100 µm.