CA Filter Membrane
1.Pore ​​sizes: 0.1μm, 0.22μm, 0.45μm, 0.8μm, 1.0μm, 3.0μm, 5.0μm;
2.Diameter: 13mm, 25mm, 47mm, 50mm, 60mm, 90mm, 142mm, 150mm, 200mm, 293mm, 300mm;
3.Width: 280mm;
5.Chemical Compatibility:for aqueous samples.

Availability: In Stock

Description of CA Filter Membrane

A CA filter membrane typically refers to a membrane filter made from cellulose acetate (CA). Cellulose acetate is a type of synthetic polymer derived from cellulose, a natural polymer found in plants. Cellulose acetate membranes are commonly used in various filtration applications, including laboratory and industrial processes.


  • Chemical Compatibility: CA filter membranes are compatible with a wide range of chemicals, making them suitable for filtering solutions with various compositions.
  • Biocompatibility: These membranes are often used in biological and pharmaceutical applications because they are biocompatible, meaning they do not introduce harmful substances that could interfere with biological processes.
  • Low Protein Binding: CA membranes typically have low protein binding properties, which is important when filtering solutions containing proteins or biomolecules to minimize sample loss.
  • High Flow Rates: Cellulose acetate membranes have relatively high flow rates, making them efficient for filtration processes.
  • Microbial Filtration: They are commonly used for sterile filtration, where they help remove microorganisms such as bacteria and fungi from liquids.
  • Pore Size Options: CA filter membranes are available in various pore sizes, allowing for customization depending on the specific filtration requirements.
  • Applications for CA filter membranes include the filtration of aqueous solutions, culture media, pharmaceuticals, and many other substances where a controlled separation of particles or microorganisms is needed.

Filter Membrane Disc Filter Membrane Roll

Features of CA Filter Membrane

  • Biocompatibility: Cellulose acetate is known for its biocompatibility, making it suitable for applications involving biological samples, such as protein purification, sterile filtration, and DNA/RNA filtration.
  • Chemical Resistance: CA membranes are resistant to a wide range of chemicals, including acids, bases, and most organic solvents, making them versatile for various filtration tasks.
  • Hydrophilic Nature: CA membranes are hydrophilic, which means they are readily wet with aqueous solutions. This property allows for efficient filtration of aqueous samples without the need for pre-wetting.
  • Low Protein Binding: CA membranes typically exhibit low protein binding properties, which is crucial for applications like protein filtration and sample preparation in the biotechnology and pharmaceutical industries.
  • Pore Size Variety: CA filter membranes are available in a range of pore sizes, from microfiltration to ultrafiltration, allowing precise filtration based on the desired particle or molecule size.
  • Heat Resistance: They can withstand autoclaving and high-temperature sterilization processes, making them suitable for applications that require sterilization.
  • Mechanical Strength: CA membranes have good mechanical strength, making them suitable for pressure-driven filtration methods.
  • Improved solvent resistance to low molecular weight alcohols, and better heat resistance relative to sterile gridded MCE filter membrane and MCE filter membrane.


  • Sterile Filtration: CA filter membranes are often used for the sterilization of culture media, buffers, and other aqueous solutions in laboratory settings to prevent microbial contamination.
  • Protein Purification: Their low protein-binding properties make CA membranes suitable for protein purification applications. They help retain the proteins of interest while minimizing sample loss.
  • DNA and RNA Filtration: CA membranes are used to remove unwanted particles and impurities from DNA and RNA samples, ensuring high-quality genetic material for downstream applications like PCR and sequencing.
  • Microbiological Analysis: In microbiology, CA membranes are employed for microbial colony counting and examination of water quality, where they trap bacteria or other microorganisms.
  • Pharmaceutical Filtration: CA filter membranes are used in the pharmaceutical industry for applications such as drug formulation, sterile drug preparation, and quality control processes.
  • Food and Beverage Industry: CA membranes are utilized in food and beverage processing to remove particles, microorganisms, and other impurities from liquids such as juices, wine, and beer.
  • Environmental Monitoring: CA membranes are employed to filter water samples in environmental monitoring to analyze pollutants, microorganisms, and particulate matter.
  • Chemical Filtration: CA membranes can be used in the filtration of chemicals, solvents, and reagents to remove impurities and ensure the purity of the final product.
  • Oil and Gas Industry: In the oil and gas sector, CA membranes are used for water purification, including the removal of oil and solids from produced water.
  • Air Filtration: CA membranes are used in some air filtration systems to capture particles and impurities, improving indoor air quality.

Scanning Electron Microscope Picture

Technical Data

Filter MediaHydrophilic CA
Pore Size0.1μm, 0.22μm, 0.45μm, 0.8μm, 1.0μm, 3.0μm, 5.0μm
Diameter(Disc)13mm, 25mm, 47mm, 50mm, 60mm, 90mm, 142mm, 150mm, 200mm, 293mm, 300mm
Bubble Point≥0.31MPa(0.22μm)≥0.15MPa(0.45μm)
Flow Rate @23°C, H2O≥10mL/min/cm2@1 bar(0.22μm)≥20mL/min/cm2@1 bar(0.45μm)
pH Range3.5-8
Chemical CompatibilityIdeal for aqueous samples
Maximum Operating Pressure4.2 bar@23°C1.5 bar@85°C

Ordering Information

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