Utilized in a broad range of chemical manufacturing applications, the Fillter Circles, Qualitative, Grade 540, Ø 42.5 Mm are renowned for their high chemical resistance to strong acids and alkalis. These filter circles, produced by Whatman, offer a basis weight of 88 g/m² and a typical thickness of 160 µm, ensuring efficient filtration within 200 seconds. With a particle retention in liquid of 8 µm, they are ideal for gravimetric analysis of metals in acid/alkali solutions and for collecting hydroxides after precipitation by strong alkalis. Available in various sizes, these filter circles fall under the category of Quantitative Filter Papers, making them an essential tool in numerous laboratory settings.

• Category: Quantitative Filter Papers
• Particle retention in liquid: 8 µm
• Typical thickness: 160 µm
• Filter type: filter circle
• UNSPSC 13.5: 41104929
• Diameter [mm]: 42.5
• Description: medium
• Ash content: < 0.006 %
• Brand: Whatman
• Type: Sorte 540
• Basis weight: 88 g / m2
• Filtration speed Herzberg: 200 s
• Filtration time [s]: 200