Produced for stability across temperature-sensitive applications, the "Fillter Circles, Qualitative, Grade 540, Ø 21 Mm" are engineered with a medium filtration rate and particle retention of 8 µm. These quantitative filter papers, categorized under Whatman's Sorte 540, boast a basis weight of 88 g/m² and a typical thickness of 160 µm. Suitable for gravimetric analysis of metals in acid/alkali solutions and hydroxide collection following strong alkali precipitation, these filter circles offer high chemical resistance to both strong acids and alkalis.

• Category: Quantitative Filter Papers
• Particle retention in liquid: 8 µm
• Brand: Whatman
• Ash content: < 0.006 %
• Typical thickness: 160 µm
• Filter type: filter circle
• Diameter [mm]: 21
• Basis weight: 88 g / m2
• Description: medium
• Filtration time [s]: 200
• UNSPSC 13.5: 41104929
• Filtration speed Herzberg: 200 s
• Type: Sorte 540