Nylon Membrane Circle, 0.2um Pore Size, 25mm, 100/Pk SKU: 7402-002

Nylon Membrane Filters - 7402-002

The Whatman 7402-002 protects sensitive instrumentation and sample integrity by providing reliable particulate removal with minimal analyte adsorption or background interference. Underpinning this performance, quality-controlled manufacturing ensures the filtration medium delivers the retention efficiency and throughput that demanding laboratory protocols require. Each membrane disc reflects a manufacturing standard where retention characteristics, physical integrity, and dimensional accuracy are verified before release.

Material Specifications

• Naturally hydrophilic and constructed with high tensile strength, Nylon provides reliable performance without pre-wetting in aqueous applications.
• Packaged without sterilization for applications where downstream sterility is achieved by other means or is not a process requirement.
• High mechanical strength allows Nylon membranes to withstand elevated differential pressures without structural deformation.
• Broad compatibility with alcohols, aliphatic hydrocarbons, and aromatic solvents extends Nylon filtration into mixed-solvent sample preparation.
• Ideal for filtering aqueous biological solutions and mobile phases.

Environmental monitoring programs where sample-to-sample comparability determines trend validity benefit directly from the lot-level consistency of these membranes, removing the filter as a variable in your long-term data sets. In these cases, alkaline resistance that other membranes cannot match means you can filter high-pH buffers, basic mobile phases, and caustic wash solutions without the membrane degradation that limits cellulose-based and PES alternatives. 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)

40-49psi

Color

white

Diameter

25mm

Extractables

low

Filtration Area

4.91cm²

Flow Rate

> 50ml (Water)

Grid (Yes/No)

No

Material

Nylon

Maximum Operating Pressure

Holder-dependent

Maximum Operating Temperature (°C)

135°C

Membrane Thickness (µm)

150-187um

Pack Count

100

pH Range

3-14

Pore Size (µm)

0.2

Sterility

Nonsterile

Sterilization

Autoclavable at 121°C for 30 mins

Support Material

None

Wettability

Hydrophilic

• Solid Phase Extraction - Acts as a frit or barrier in custom extraction columns, retaining sorbent beds while allowing solvent to pass through.
• Atmospheric Testing - Used in dry deposition sampling to capture specific atmospheric nitrates and sulfates for environmental quality studies.
• Northern Blotting - Excellent for RNA transfer applications where high tensile strength is required for multiple rounds of probe stripping.
• Gene Mapping Support - Provides a stable, charge-modified surface for DNA immobilization, facilitating precise gene mapping and analysis steps.
• Southern Blot Transfer - Binds nucleic acids strongly during capillary transfer, providing a durable matrix for repeated hybridization cycles.
• Alkaline Filtration - Withstands high-pH solutions during industrial fluid processing, offering durability where other polymers might degrade.