WCN WH 47mm 1.0um100/Pk SKU: 7190-004

Cellulose Nitrate (CN) Membrane Filters - 7190-004

The Whatman 7190-004 protects sensitive instrumentation and sample integrity by providing reliable particulate removal with minimal analyte adsorption or background interference. Central to its design, a uniform Cellulose Nitrate (CN) matrix maintains its rated 1.0 cutoff under the pressures and flow conditions encountered during routine laboratory filtration. Each membrane disc reflects a manufacturing standard where retention characteristics, physical integrity, and dimensional accuracy are verified before release.

Material Specifications

• Autoclavable at 121°C without loss of integrity, cellulose nitrate membranes maintain their rated pore structure and dimensional stability through repeated sterilization cycles.
• Naturally hydrophilic and compatible with aqueous solutions, cellulose nitrate delivers high flow rates and rapid wet-out without requiring pre-conditioning or surfactant treatment.
• Surface retention characteristics allow captured particles and microorganisms to remain on the membrane face, supporting direct microscopic examination and physical recovery of collected material.
• 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.
• Cellulose nitrate membranes feature a narrow pore size distribution and low extractable levels, providing the controlled retention characteristics required for gravimetric and particulate analysis.

When your analytical method specifies membrane filtration as a sample preparation step, the retention characteristics and extractable profiles documented above allow you to meet method requirements without additional qualification work. Because cellulose nitrate dissolves completely in organic solvents like acetone and amyl acetate, you can recover every captured particle from the membrane surface for downstream gravimetric, spectroscopic, or chemical analysis. 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)

14.5psi

Color

white

Diameter

47mm

Extractables

low

Filtration Area

17.35cm²

Flow Rate

200ml (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)

1

Sterility

Nonsterile

Sterilization

Autoclavable at 121°C for 30 mins

Support Material

None

Wettability

Hydrophilic

• Colony Enumeration - Gridded surface variants facilitate accurate plate counting of captured microorganisms under standard magnification.
• Bioburden Monitoring - Surface retention keeps captured organisms accessible for direct incubation and enumeration without transfer steps.
• Aerosol Analysis - Low tare weight and acid digestibility enable chemical characterization of airborne particulates from air sampling.
• Gravimetric Particulate Analysis - Dissolves in organic solvents for complete particle recovery and accurate weight-based quantification.
• Routine Sample Prep - Uniform microporous matrix provides consistent flow rates and reliable particle retention for general aqueous solutions.
• Microscopy Examination - Particles remain on the membrane surface for direct visual inspection, supporting identification and classification.