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    301

    What is Grade 301?

    Grade 301 is the slowest of the qualitative papers. This grade is used in qualitative analytical techniques to determine and identify materials. It is also extremely efficient in retaining very fine particles. Grade 301 is generally used for biological products, water analysis, soil analysis and fine precipitates such as cold precipitated barium sulfate. Grade 301 is additionally utilized with Buchner funnels and to clarify cloudy suspensions and wine.

    Whatman Cross Reference = No.5
    Speed class Very Slow Filtering
    Thickness (mm) 0.14
    Pore size (μM) 2-3
    Weight (g/m²) 84
    Filtration Speed (sec*) 180
    Burst Strength (Kg/cm²) > 0.30
    *According to DIN 53137
    Diameter (mm) Product Code
    55 301055
    70 301070
    90 301090
    110 301110
    125 301125
    150 301150
    185 301185
    240 301240
    300 301300
    320 301320