Intended for structured formulation workflows, the Filter Circles, Qualitative, Grade 4, Dia.: 55 Mm, from Whatman, serve as efficient tools for filtering coarse particles and gelatinous precipitates, such as ferric hydroxide and aluminum hydroxide. These filters exhibit an impressive filtration speed of 37 seconds, making them suitable for applications requiring high flow rates. With a particle retention range of 20 to 25 microns, they offer reliable performance in the filtration of biological fluids or organic extracts during analysis. The filters have a weight of 96 grams per square meter and a thickness of 0.2 millimeters, ensuring durability and consistent results.

• Category: Qualitative Filter Papers
• UNSPSC 13.5: 41104929
• Type: Sorte 4
• Particle retention: 20 to 25 µm
• Weight: 96 g / m2
• Diameter [mm]: 55
• Filter type: filter circle
• Ash: 0.06 %
• Filtration speed: 37 s
• Filtration time [s]: 37
• Thickness: 0.20 mm
• Brand: Whatman