What is the difference between Purmol 3ST and Purmol 4ST?

What is the difference between Purmol 3ST and Purmol 4ST?

Purmol 3ST is a potassium (K) type A zeolite with a pore size of approximately 3 Ã…ngstroms (0.32 nm).Purmol 4ST is a Sodium (Na) type A zeolite with a pore size of approximately 4 Ã…ngstroms (0.4 nm).Both are excellent moisture scavengers, with Purmol 3ST being more exclusive to moisture adsorption.Purmol 4ST combines high adsorption capacity for water and slightly larger molecules, such as CO2 and smaller hydrocarbons.

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