Pura Disc 25mm PES Syringe Filters, 0.2um, 1000 Pk
Whatman SKU: 6794-2502

Whatman Puradisc Polyethersulfone (PES) Syringe Filters, 0.2 µm, 25 mm, 1000/Pk - 6794-2502

Whatman verifies performance ratings at the lot level using process controls that stay uniform across its entire filtration lineup. A sterilizing-grade syringe filter delivers point-of-use sterile filtration in a single-use format, without the housing and gasket maintenance a reusable stainless steel filter holder requires. PES provides sterile-grade retention at the rated sub-micron pore size while pairing fast flow with reduced protein adsorption and admits aqueous reagents on contact, skipping any surfactant rinse. The polypropylene housing maintains its geometry through sample runs up to 121°C while staying inert across common laboratory solvents and keeps the sample chemically unaltered across the pass. For workflows requiring validated sterile-grade performance, point-of-use retention meets it without a separate sterilization step.

Technical Specifications

• Sterilizing-grade PES membrane lots are challenge-tested against Brevundimonas diminuta to qualify 0.2 micron retention
• Ionic extractables from the membrane stay very low
• Antibody and protein samples pass through PES with minimal adsorptive loss
• Non-hydrogen-bonding surface avoids the polar adsorption nylon's amide backbone causes
• Finest available pore ratings achieve aseptic-grade filtration performance

Housing Specifications

• Standardized luer connection geometry provides secure engagement with standard syringe tips
• Low moisture absorption keeps the housing dimensionally stable through humid storage and shipping
• Medical-grade polypropylene with broad chemical compatibility
• Polypropylene housing withstands operating temperatures up to 121°C without softening or dimensional distortion.

Filtering every buffer before loading keeps your instrument running clean and uninterrupted. Upstream buffer clarification keeps avoidable particulates out of your flow path while keeping the filtrate analytically clean. Bulk pricing kicks in on larger filtration orders, so ask the Tisch Scientific team for a quote.

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

Bubble Point (psi)

3.4 bar (50 psi)

Burst Pressure (psi)

75psi

Connection Type

Luer-Lok/ Luer Slip

Construction

Polypropylene

Diameter

25mm

Filtration Area

4.2cm²

Holdup Volume

<100µl

Material

Polyethersulfone (PES)

Maximum Operating Pressure

75psi

Maximum Operating Temperature (°C)

121°C

Pack Count

1000

Pore Size (µm)

0.2

Prefilter (Yes/No)

No

Sterility

Nonsterile

Sterilization

Autoclavable 121°C

Volume Throughput (ml)

Up to 100ml

Wettability

Hydrophilic

• Pesticide Residue Testing - PES membranes improve polar pesticide recovery in food-safety LC-MS/MS testing versus hydrogen-bonding nylon.
• Biological Assays - Protects sensitive enzymatic and antibody-based assays from particulate interference without adsorbing critical reagents.
• Cell Culture - Reduces the risk of mycoplasma contamination in growth media, supporting healthier cell lines and more reliable experimental outcomes.
• Sample Recovery - Minimizes sample loss in low-protein-binding applications, delivering high yield for precious or rare biological specimens.
• Nucleic Acid Recovery - Processes DNA and RNA extracts with minimal nucleic acid adsorption, preserving yield on the hydrophilic PES surface.
• PFAS Water Testing - PES filters process aqueous samples for EPA Method 1633A PFAS testing without added fluorinated background.