WCN WH 142mm 1.2um 25/Pk SKU: 7191-014

Cellulose Nitrate (CN) Membrane Filters - 7191-014

Engineered for high retention efficiency and superior chemical stability, the Whatman 7191-014 achieves reliable separation results across a broad range of analytical and preparative applications. Central to its design, reproducible separation characteristics define the membrane structure, protecting downstream instruments and preserving sample integrity throughout the filtration process. With this in mind, controlled production conditions produce membranes with documented pore size distribution and thickness tolerances, supporting method reproducibility across multiple filter lots.

Material Specifications

• 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.
• Surface retention characteristics allow captured particles and microorganisms to remain on the membrane face, supporting direct microscopic examination and physical recovery of collected material.
• Cellulose nitrate membranes feature a narrow pore size distribution and low extractable levels, providing the controlled retention characteristics required for gravimetric and particulate analysis.
• Naturally hydrophilic and compatible with aqueous solutions, cellulose nitrate delivers high flow rates and rapid wet-out without requiring pre-conditioning or surfactant treatment.
• Supplied in bulk non-sterile packaging, offering an economical option for routine clarification and general laboratory filtration tasks.

Reproducible particle counting and size distribution analysis start with a membrane surface that captures particles uniformly — the pore consistency documented above ensures your counts reflect the sample, not random variation in the filter. The high protein binding capacity of cellulose nitrate provides the strong surface adsorption that your blotting protocols depend on, immobilizing target molecules efficiently for detection with minimal wash-off during subsequent processing steps. Secure your research outcomes by partnering with a filtration solution that understands your need for speed, accuracy, and reproducibility.

For more information about chemical compatibility, please review our Chemical Compatibility Chart.

Bubble Point (psi)

10.2psi

Color

white

Diameter

142mm

Extractables

low

Filtration Area

158.37cm²

Flow Rate

280ml (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

25

pH Range

4-9

Pore Size (µm)

1.2

Sterility

Nonsterile

Sterilization

Autoclavable at 121°C for 30 mins

Support Material

None

Wettability

Hydrophilic

• Microscopy Examination - Particles remain on the membrane surface for direct visual inspection, supporting identification and classification.
• Bioburden Monitoring - Surface retention keeps captured organisms accessible for direct incubation and enumeration without transfer steps.
• Environmental Compliance - Documented retention characteristics at standard pore ratings support reproducibility in regulated testing programs.
• Gravimetric Particulate Analysis - Dissolves in organic solvents for complete particle recovery and accurate weight-based quantification.
• Biochemical Assays - High protein-binding capacity effectively immobilizes macromolecules, supporting lateral flow and diagnostic testing.
• Aerosol Analysis - Low tare weight and acid digestibility enable chemical characterization of airborne particulates from air sampling.