Made available in multiple packaging formats for flexible procurement, these Qualitative Filter Circles, Grade 4, with a diameter of 125 millimeters, are suitable for various applications. These filter circles, manufactured by Whatman, offer an exceptional filtration speed of 37 seconds, making them ideal for quick and efficient filtration processes. With a particle retention range of 20 to 25 micrometers, they effectively capture coarse particles and gelatinous precipitates, such as ferric hydroxide and aluminum hydroxide. This makes them particularly valuable for routine clean-up tasks involving biological fluids or organic extracts during analysis, especially when high flow rates are necessary and the collection of fine particles is not critical. The filter circles boast a thickness of 0.20 millimeters and a weight of 96 grams per square meter, ensuring durability and consistent performance.

• Category: Qualitative Filter Papers
• Particle retention: 20 to 25 µm
• Filtration time [s]: 37
• Ash: 0.06 %
• Filter type: filter circle
• Type: Sorte 4
• Filtration speed: 37 s
• Diameter [mm]: 125
• Thickness: 0.20 mm
• Weight: 96 g / m2
• UNSPSC 13.5: 41104929
• Brand: Whatman