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Thumbnail Filmstrip of Plain Cellulose Nitrate Membrane, 0.1um Pore Size, 25mm Circle (100 pcs) Images
Cellulose Nitrate (CN) Membrane Filters - 7181-002
Engineered for high retention efficiency and superior chemical stability, the Whatman 7181-002 achieves reliable separation results across a broad range of analytical and preparative applications. Precision membrane geometry balances retention sharpness with sustainable flow rates, minimizing the pressure buildup that leads to premature filter replacement. Each membrane disc reflects a manufacturing standard where retention characteristics, physical integrity, and dimensional accuracy are verified before release.
Material Specifications
- Cellulose nitrate membranes feature a narrow pore size distribution and low extractable levels, providing the controlled retention characteristics required for gravimetric and particulate analysis.
- High protein binding capacity makes cellulose nitrate the preferred membrane for Western blotting, dot blotting, and nucleic acid immobilization techniques that rely on efficient surface adsorption.
- Naturally hydrophilic and compatible with aqueous solutions, cellulose nitrate delivers high flow rates and rapid wet-out without requiring pre-conditioning or surfactant treatment.
- Dissolves completely in specific organic solvents, enabling full recovery of captured particles from the membrane surface for downstream gravimetric, chemical, or spectroscopic analysis.
- Surface retention characteristics allow captured particles and microorganisms to remain on the membrane face, supporting direct microscopic examination and physical recovery of collected material.
Whether your method calls for gravimetric analysis, particle visualization, or microbial enumeration, the pore consistency and surface uniformity documented above ensure that your results reflect the sample — not the filter. In particular, the narrow pore size distribution of cellulose nitrate membranes ensures your retention data is consistent across batches, reducing the inter-sample variability that complicates quantitative particulate and microbiological analyses. Elevate the quality of your analytical data today by standardizing on a filtration product built to meet the exact specifications of your applications.
For more information about chemical compatibility, please review our Chemical Compatibility Chart.
- Bubble Point (psi)
- > 80psi
- Color
- white
- Diameter
- 25mm
- Extractables
- low
- Filtration Area
- 4.91cm²
- Flow Rate
- 5ml (Water)
- Grid (Yes/No)
- No
- Material
- Cellulose Nitrate (CN)
- Maximum Operating Pressure
- Holder-dependent
- Maximum Operating Temperature (°C)
- 80°C
- Membrane Thickness (µm)
- 105–140um
- Pack Count
- 100
- pH Range
- 4-9
- Pore Size (µm)
- 0.1
- Sterility
- Nonsterile
- Sterilization
- Autoclavable at 121°C for 30 mins
- Support Material
- None
- Wettability
- Hydrophilic
- Gravimetric Particulate Analysis - Dissolves in organic solvents for complete particle recovery and accurate weight-based quantification.
- Water Quality Testing - Narrow pore distribution retains indicator organisms consistently for regulatory compliance in environmental laboratories.
- Biochemical Assays - High protein-binding capacity effectively immobilizes macromolecules, supporting lateral flow and diagnostic testing.
- Microscopy Examination - Particles remain on the membrane surface for direct visual inspection, supporting identification and classification.
- Routine Sample Prep - Uniform microporous matrix provides consistent flow rates and reliable particle retention for general aqueous solutions.
- Bioburden Monitoring - Surface retention keeps captured organisms accessible for direct incubation and enumeration without transfer steps.