Available for professional procurement in standard pack sizes, these Qualitative Filter Circles, Grade 4, offer exceptional performance in filtering coarse particles and gelatinous precipitates such as ferric hydroxide and aluminium hydroxide. Ideal for routine clean-up of biological fluids or organic extracts during analysis, they provide very fast filtering with excellent retention. With a diameter of 110 mm, a thickness of 0.20 mm, and a weight of 96 g/m², these filters are manufactured by Whatman and have a filtration speed of 37 seconds and a particle retention range of 20 to 25 µm. These qualitative filter circles are suitable for applications where high flow rates are required and the collection of fine particles is not critical.

• Category: Qualitative Filter Papers
• Diameter [mm]: 110
• Filtration time [s]: 37
• Particle retention: 20 to 25 µm
• Filter type: filter circle
• Weight: 96 g / m2
• Ash: 0.06 %
• Filtration speed: 37 s
• Thickness: 0.20 mm
• Type: Sorte 4
• UNSPSC 13.5: 41104929
• Brand: Whatman