PTFE Membrane Filter Discs, Laminated, 0.45um, 25mm, Nonsterile, 100/Pk
GVS SKU: 1215492

Featuring a hydrophobic polytetrafluoroethylene (PTFE) membrane laminated to a polypropylene support, these 25mm filter discs deliver a 0.45um pore size in a durable, easy-to-handle format. The expanded PTFE structure forms a three-dimensional, web-like network of microscopic pores that captures particulate on the membrane surface while allowing air and gases to pass freely. Each pack contains 100 nonsterile discs.

Key PTFE Membrane Characteristics

• Naturally hydrophobic: the inherent water-resistant, non-stick nature of PTFE makes the membrane ideal for venting, gas filtration, and phase separation.
• Broad chemical compatibility: withstands strong acids and most aggressive solvents, including alcohols.
• Surface particulate capture: the expanded, web-like pore structure collects particulate on the membrane surface for easy removal.
• Aqueous compatibility when prewetted: can filter aqueous solutions after prewetting with methanol.
• Autoclavable: rated for sterilization up to 130 degrees C.

Key Construction Characteristics

• Laminated support: the PTFE membrane is laminated to a polypropylene support for improved durability and easy handling.
• Pore size: 0.45um.
• Diameter: 25mm.
• Sterility: nonsterile.
• Pack: 100 discs per pack.

These discs provide a consistent, chemically and thermally robust barrier to particulate matter across demanding analytical and process workflows. The hydrophobic membrane maintains reliable air and gas flow while protecting sample integrity. Durable lamination ensures dependable handling from setup through filtration.

Construction

Laminated

Diameter

25mm

Material

Polytetrafluoroethylene (PTFE)

Maximum Operating Temperature (°C)

130

Membrane Color

White

Pack Count

100

Pore Size (µm)

0.45

Sterility

Nonsterile

Sterilization

Autoclavable up to 130 °C

Support Material

Polypropylene (PP)

Wettability

Hydrophobic

• Sterile and Process Venting The hydrophobic PTFE membrane allows air and gases to pass freely while blocking liquid and particulate, making it well suited to vent applications.
• Air and Gas Filtration Filters particulate from air and gas streams thanks to the non-wetting, chemically resistant PTFE structure.
• Aggressive Solvent and Acid Filtration Broad chemical compatibility supports clarification of strong acids and aggressive organic solvents such as alcohols.
• Phase Separation The hydrophobic surface enables separation of aqueous and gas phases in laboratory setups.
• Aerosol and Environmental Sampling Surface particulate capture supports aerosol sampling and environmental monitoring workflows.
• Aqueous Sample Clarification When prewetted with methanol, the membrane clarifies aqueous solutions at a 0.45um cutoff.