Pura Disc 25mm PES Syringe Filters, 0.45um, 200 Pk
Whatman SKU: 6781-2504

Whatman Puradisc Polyethersulfone (PES) Syringe Filters, 0.45 µm, 25 mm, 200/Pk - 6781-2504

Whatman manufactures under Cytiva's quality infrastructure, drawing on a filtration heritage that spans laboratory, environmental, and industrial applications. Across analytical workflows, the syringe filter is where particulates leave the sample stream. The PES membrane keeps protein adsorption low for accurate sample recovery while accepting water-based reagents without preconditioning and clarifies particulates at the rated pore size. The polypropylene housing contributes minimal extractables to the filtrate and resists aqueous acids, bases, and alcohols. Where small-volume samples must reach the instrument clean, syringe filtration clears particulates in a single pass.

Technical Specifications

• Low protein binding preserves dilute analytes for maximum recovery
• Broad compatibility with aqueous buffers, aliphatic alcohols, glycols, and strong bases
• High flow rate with low extractable background for clean preparations
• Stable across the full pH 1 to 14 operating range
• Absolute pore size rating gives consistent results across protocols

Housing Specifications

• Medical-grade polypropylene with broad chemical compatibility
• Reliable housing-to-membrane seal prevents bypass at rated pressure
• Low extractable contribution protects sensitive downstream analyses
• Resists aqueous acids, bases, and alcohols in routine sample prep

Clarify your routine aqueous samples in a single pass and cut down on juggling multiple filter types at the bench. General-purpose aqueous filtration supports the sample types you handle every day across your water-analysis and general analytical workflows. Ask our friendly customer service team to confirm the pore size, membrane, and sterility options your filtration application calls for.

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

Bubble Point (psi)

2.3 bar (33 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

200

Pore Size (µm)

0.45

Prefilter (Yes/No)

No

Sterility

Nonsterile

Sterilization

Autoclavable 121°C

Volume Throughput (ml)

Up to 100ml

Wettability

Hydrophilic

• Biological Sample Prep - The low protein-binding nature of PES ensures maximum recovery of critical enzymes and proteins
• Ion Chromatography - The extremely low extractable profile of PES provides the clean baselines needed for sensitive IC analysis
• Life Science Applications - Ideal for filtering serum and plasma, where minimizing nonspecific binding is crucial for assay accuracy
• Culture Media Filtration - PES offers the fastest flow rates for viscous culture media while maintaining absolute sterility
• Research & Development - Supports protocols that need to remove particulates, providing the ability to protect analytical instruments
• Analytical Sample Prep - Optimized to ensure data integrity by effectively removing particulates before instrumental analysis