Fritted Glass Porosity Chart

The following chart applies to all fritted glassware we sell (discs, fritted funnels, dispersion tubes etc.).

Porosity Pore Size (microns) Typical uses and Notes
Fine (F) 4 - 5.5 Filtration of extremely fine precipitates, extraction. Not recommended for routine filtration as these run very slowly, are prone to clogging, and difficult to clean.
Medium (M) 10 - 16 Ideal for routine organic/inorganic extractions and filtrations and collection of crystalline materials.
Coarse (C) 40 - 60 Gas dispersion, gas washing, extractions, mercury filtration.
Extra Coarse (XC) 170 - 200 Support for other filter media, gas dispersion, gas washing