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Qualitative Papers/ Grade 131

These filter papers are especially suitable for qualitative analyses that require a low ash content.

Item no.:  FT-4-351-125

Availability:  On Request

  • Pure cotton linters or cotton linters with refined pulp
  • No additives, such as wet-strengthening agents


Filter Papers for the Laboratory and Industry
en 9.1 MB
Papiers filtres pour les laboratoires et l’industrie
fr 10.7 MB
Carte da filtro per il laboratorio e l’industria
it 9.0 MB


Laboratory Filtration Products (US and Canada)
en 9.6 MB

Product properties

  • Color
  • Dimensions
    125 mm
  • Weight
    80 g/m²
  • Retention Rate
    3–5 µm
  • Primary Product Type
  • Grade
  • Packaging
    Non-sterile, bulk packed
  • Pack Size
  • Material
    Cotton linters and refined pulp, low-phosphate and low sodium
  • Filter Type
    Qualitative Filter Papers
  • Filter Format

Technical attributes

  • Filter Material
    Cotton Linters and Refined Pulp (low-phosphate and potassium; < 0.02 % ash)
  • Area of Application
    • Clarification
    • Analytical Sample Preparation
    • Particle Analysis
  • Thickness
    0.16 mm
  • Filtration time
    100 s
  • Specifications
    Narrow-pore, dense, slow filtering
  • Precipitations
    Fine crystalline