Wim Mak

Classification Expert (Class 4, 5 and 9) - Energetic Materials & Dangerous Goods

Wim Mak, consultant in the Energetic Material department is active in the field of Dangerous Goods and has more than three decades of experience in testing and classifying materials for all kinds of industries worldwide. These analyses play an essential role in identifying potential risk factors related to the processing, handling and storage of hazardous materials and are key to preventing industrial, logistics and warehousing incidents.

  • Testing and Classification of dangerous goods (TDG , CLP , ADR, IMDG) of:

Class 4 (flammable solids, self-reactives)

Class 5 (oxidizing agents & organic peroxides) and

Class 9 (miscellaneous dangerous goods and equivalent GHS categories)

  • Determination of phys-chem properties (cf. UN MTC, CLP, REACH) such as thermal stability, sensitivity (to spark, friction, impact) , response to heating or ignition, detonation and deflagration.
  • Organic peroxides, self-reactive substances, self-heating substances, flammable substances, ammonium nitrate based fertilizers, detergents, etc.

Chairman of the International Group of Experts on the Explosion Risks of Unstable Substances (IGUS), energetic and oxidizing substance working group.


Lange Kleiweg 137
NL-2288 GJ Rijswijk

Postal address

P.O. Box 45
NL-2280 AA Rijswijk