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    What is Grade 323?

    This fast flow rate grade with very good retention is a tighter version of Grade 325. A general purpose creped filter has a rough surface for less critical routine analysis. It is often found in the food industry and is widely used to assay sucrose in cane sugar and within pharmaceutical laboratories for routine filtration. These extremely strong filter papers have a high wet strength due to the addition of a small quantity of chemically stable resin. Normal qualitative applications will not introduce any significant impurities into the filtrate. The resins do however, contain nitrogen so these grades should not be used in Kjeldahl estimations etc. Some wet strengthened grades are available in folded (pre-pleated) forms.

    Whatman Cross Reference = No.91
    Speed class Fast Filtration
    Thickness (mm) 0.14
    Pore size (μM) 20-30
    Weight (g/m²) 64
    Filtration Speed (sec*) 30
    Burst Strength (Kg/cm²) 1.6
    *According to DIN 53137
    Diameter (mm) Product Code
    mm: 55 Product code: 323055
    mm: 70 Product code: 323070
    mm: 90 Product code: 323090
    mm: 110 Product code: 323110
    mm: 125 Product code: 323125
    mm: 150 Product code: 323150
    mm: 185 Product code: 323185
    mm: 240 Product code: 323240
    mm: 300 Product code: 323300
    mm: 320 Product code: 323320