Vapor Phase, Potassium Permanganate Activated Alumina


Hydrosil’s HS-400 is a spherical activated alumina that is impregnated with no less than 4.0% weight potassium permanganate (KMnO4). The media shall have 2.0 pounds of potassium permanganate per cubic foot. The HS-400 is found in exhaust systems, air dryers, and general HVAC applications.

What’s the Difference Between HS-600 and HS-400?

HS-400 is activated alumina impregnated media and HS-600 is zeolite impregnated media. Both medias are impregnated with potassium permanganate (KMnO4) which oxidizes acid gases and odors. The HS-600 is a harder material than the HS-400; Therefore, the HS-600 will result in insignificant dusting. Depending on the application, Hydrosil will suggest either the HS-600 or HS-400.


Pressure Drop


Property: Value:
Apparent Density, lb/ft 3 49-51
Potassium Permanganate, % wt. range 4.0-6.0
U.S. Standard Sieve Size (Mesh Size) 3 x 6, 14 x 28, 20 x 50
Moisture Content, % wt. 10-15
Crush Strength, kg min. 2.3
Hydrogen Sulfide Capacity, g/cc 0.08
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Common Applications:

  • 1,2-dichloroethane (DCE)
  • Trichloroethylene (TCE)
  • Hydrogen Sulfide
  • Mercaptans
  • Acid gases
  • Vinyl chloride (VC)
  • Common Odors
  • Aldehydes
  • Ethylene
  • Amines
  • Chlorinated Solvents