Hydrosil International LTD.125 Prairie Lake Road - East Dundee, IL 60118

Phone: 847-844-0680

Emergency Phone: 847-844-0680

Fax: 847-844-0799


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

typical physical properties

Apparent Density, lb/ft 349-51
Potassium Permanganate, % wt. range4.0-6.0
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/cc0.08

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