Noted for its role as an intermediate in complex synthesis pathways, the Qualitative Filter Circles, Grade 4, with a diameter of 90 mm, are particularly valuable in the lab setting. These filters, manufactured by Whatman, boast a thickness of 0.20 mm and a weight of 96 g/m2. They excel at filtering particles within the range of 20 to 25 micrometers, making them suitable for the rapid filtration of coarse particles and gelatinous precipitates such as ferric hydroxide and aluminum hydroxide. Their filtration speed is impressive, completing the process in just 37 seconds. This quick filtration makes them ideal for various applications, including the cleanup of biological fluids or organic extracts during analysis, where high flow rates are essential.

• Category: Qualitative Filter Papers
• UNSPSC 13.5: 41104929
• Filtration time [s]: 37
• Ash: 0.06 %
• Weight: 96 g / m2
• Thickness: 0.20 mm
• Filter type: filter circle
• Type: Sorte 4
• Particle retention: 20 to 25 µm
• Diameter [mm]: 90
• Brand: Whatman
• Filtration speed: 37 s