Valued in production environments for consistent processing properties, Whatman's Qualitative Filter Papers, Grade 4, provide exceptional filtration capabilities, particularly excelling in the removal of coarse particles and gelatinous precipitates such as ferric hydroxide and aluminium hydroxide. These filter circles, with a diameter of 47 millimeters, offer a filtration speed of 37 seconds and retain particles between 20 and 25 microns. With a thickness of 0.2 millimeters and a weight of 96 grams per square meter, these filters are an essential tool for routine clean-up tasks in various applications, including biological fluid or organic extract analysis.

• Category: Qualitative Filter Papers
• Thickness: 0.20 mm
• Weight: 96 g / m2
• Filter type: filter circle
• Type: Sorte 4
• Filtration speed: 37 s
• Ash: 0.06 %
• Diameter [mm]: 47
• Particle retention: 20 to 25 µm
• Brand: Whatman
• Filtration time [s]: 37
• UNSPSC 13.5: 41104929