Filter papers-Round filters, MN 640 m, medium filtering, Ø 90 mm, 100 unit(s)

For qualitative analysis. Made from refined pulp washed in acid and linters with a α cellulose content of over 95%. Ash content <0.01%. Temperature stable up to approx. +130 °C. Surface weight: 85 g/m².

Medium filtration speed. Filtration time according to DIN 53137: 27 s. Equivalent white strip. For deposits such as sulphide, lead chromate, calcium oxalate. Typical uses: gravimetrical analyses, quantitative determination of retention and purification processes. Retention range: >4 μm.