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Not only is the moisture itself detrimental to explosive ammonium nitrate’s use as a blasting agent (loss of sensitivity), generation of caked product results in a loss of porosity and air voidage. This, in turn, results in poor oil absorption and eventual reduction in the performance of the ammonium nitrate for its intended function, i.e., as a blasting agent. Moreover, severely caked ammonium nitrate in warehouses may lead to an increase in sensitivity.

Arkema’s Galoryl® ATH range of anti-caking agents is applied to explosive ammonium nitrate, also known as low-density ammonium nitrate (LDAN) or industrial grade ammonium nitrate (IGAN) at the end of the ammonium nitrate production process, usually in a rotating coating drum. Our custom-made formulations are designed with high anti-caking and hydrophobic properties. They are designed to adhere to the porous prilled ammonium nitrate’s surface and provide a hydrophobic barrier against moisture. Galoryl® anti-caking agents are also very effective at impeding the formation of crystal bridges and preventing recrystallization at the substrate surface.

Unlike other more traditional anti-caking agents, Galoryl® products are neutral, resulting in no ammonia release upon application. Our coatings are available in a range of melt points and can be adapted for specific processes.


  • Moisture reduction                                                                                          
  • Reduced caking tendency                                                                                          
  • Prevention of crystal bridges                                                                                          
  • Improved hydrophobicity                                                                                          
  • Neutral pH – no NH3 release on application[AC1]                                                                                           
  • High melting point, reduced product ingress                                                                                          
  • Effective at very low dosage rates (typically 1Kg/Tonne)


More information about this range: Anti-Caking Coatings

Galoryl® ATH

Low Density Ammonium Nitrate (LDAN)

• Moisture reduction

• Reduced caking tendency

• Prevention of crystal bridges

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