Cellulose Nitrate (CN) Membrane Filter

The non-sterile membrane filters are made of cellulose nitrate (cellulose mixed ester), cellulose acetate or regenerated cellulose. They can be used for colony counting, particle testing and microscopy. Choose between gridded or non-gridded, membranes, either with or without hydrophobic edge.

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Cellulose nitrate, type 139, 0.45µm, white|green,47 mm, 100 membranes per box

Non-sterile, gridded membrane filters can be used for colony counting, particle testing and microscopy. Before usage, the filters first need to be sterilized (e.g. by autoclaving at 121°C). The membrane filters are available in different pore sizes and three different material types. Cellulose nitrate filters (mixed cellulose ester) contain a mixture of cellulose nitrate and cellulose acetate, which assures effective retention combined with high flow rates and optimal colony growth. Cellulose acetate combines high flow rates and thermal stability with very low adsorption characteristics. The various filter colors allow the best possible contrast to the colonies or particles for easy and reliable quantification and identification.

  • High flow membranes
  • Three different colors
  • The membrane filters are in accordance with the following norms: ISO 7704, ISO 7899-2, ISO 8199, ISO 9308-1 and EN 12780.


  • Application
    Microbial Enumeration  
  • Application Area
    Bioburden/Microbial enumeration  
  • Industry
    Food & Beverage  
  • Market
    Environmental/Water Testing  


  • Filter Diameter
    ⌀ 47 mm  
  • Hydrophobic Edge

General Specifications

  • Culture Media
  • Membrane Color | Grid Color
    white | green  

Materials of Construction

  • Filter Material
    Cellulose Nitrate (CN)  
  • Membrane Material
    Cellulose Nitrate (CN, Cellulose Mixed Ester)  

Physicochemical Information

  • Pore Size
    0.45 µm  
  • Wettability

Product Information

  • Pack Size
  • Package Type
  • Type


  • Delivery Condition
  • Tweezers, stainless steel


    Membrane filters should be handled with tweezers to avoid possible contamination by hand contact. Sartorius stainless steel tweezers are flammable and autoclavable. The gripping surfaces are flat and rounded for gentle, firm hold of the membrane filter.

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