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  • Cellulose Acetate Membrane Filter

    What is Cellulose Acetate?

    Johnson Test Papers’ cellulose acetate membranes are composed of pure cellulose acetate modified to provide researchers with high flow rates, thermal stability and low protein and enzyme binding capacity with the lowest binding filters available minimising sample loss and sample contamination. These hydrophilic membranes are a very reliable material therefore excellently suited for use in pressure filtration devices and both aqueous and alcoholic media. They also have high solvent resistance, particularly to low molecular weight alcohols.

    Cellulose acetate membranes have a very low aqueous extract of < 2 % and are available in the common pore sizes.

    A pore size of 0.2μm is the filter of choice for sterile filtration and clarification of aqueous solutions (pH 4 - 8), such as nutrient media, buffers and sera. It can be sterilised by most common methods without sacrificing membrane integrity. Cellulose acetate is also compatible with hydrocarbons and oil.

    Due to their high chemical resistance, cellulose acetate membrane filters from Johnson Test Papers reliably prepare liquid scintillation cocktails for scintillation counter measurement. Additionally, these membranes present high physical strength and dimensional stability (130 psi) and can filter liquids and gases up to 50 °C.

    For additional information on OEM specific applications, Johnson Test Papers has the product breadth and flexibility to meet your needs, as well as the quality standards to help ensure your success. Contact us to discuss application requirements, request free product samples and order products.


    • Ideal for use in general filtration or medical assays
    • Bacterial removal
    • Biosensors
    • HPLC flowing particle removal
    • Drug filtration
    • Organic solvent filtration
    • IV filters
    • Lateral flow assays
    • Particulate removal
    • Sterile filtration of aqueous solutions (nutrient media, sera, buffers)
    • Clarification and sterile filtration of biological fluids
    • Sterile filtration of proteins and enzymes
    • Receptor binding studies
    • Diagnostic cytology
    • Sterilisation of tissue culture media


    • High wick rates (lateral flow) - substances move quickly through the membrane
    • Uniform pore structure provides consistent flow and diffusion rates
    • Superior strength - withstands aggressive handling or can be used with automated equipment without breaking or tearing
    • Exceptional sensitivity - detects low-level components
    • Lot-to-lot consistency - quality checks produce dependable results every time
    Sterilisation Compatability Thickness Extractable Wettability Maximum Operating Temperature Pore Size Range
    Sterilization: Autoclave, ɣ-radiation (25 KGɣ) or with ethylene dioxide Thickness: 80 - 170 μM Extractable: <2% Wettability: Hydrophilic Maximum operating temperature: 50°C Pore size range: 0.22 μm - 8 μm
    Technical Specification
    Product Code Pore Size (μM) Minimum Bubble Point (psi) Typical Flow Rate (mL/min·cm²@0.07Mpa)
    CAM047020 0.22 0.28 15
    CAM047045 0.45 0.16 40