Pura Disc 25mm PES Syringe Filters, 0.45um, 1000 Pk
Whatman SKU: 6794-2514

Whatman Puradisc Polyethersulfone (PES) Syringe Filters, 0.45 µm, 25 mm, 1000/Pk - 6794-2514

Whatman applies the same process controls across its filtration portfolio, verifying rated performance at the production lot level. Sample preparation for chromatography often ends with a syringe filter on the path to the vial. The PES membrane draws aqueous buffers through without pre-wetting while tolerating aqueous buffers, aliphatic alcohols, and glycols and clarifies particulates at the rated pore size. The PP housing keeps the fluid path low in extractable contamination while staying inert across common laboratory solvents and maintains housing integrity through the filtration run. Where small-volume samples must reach the instrument clean, syringe filtration clears particulates in a single pass.

Technical Specifications

• Absolute pore size rating gives consistent results across protocols
• Naturally hydrophilic surface wets without pre-wetting in aqueous applications
• Stable across the full pH 1 to 14 operating range
• Low protein binding preserves dilute analytes for maximum recovery
• High flow rate with low extractable background for clean preparations

Housing Specifications

• Thermal-bonded construction keeps adhesives out of the fluid path
• Optimized internal geometry minimizes backpressure in service
• Resists aqueous acids, bases, and alcohols in routine sample prep
• Reliable housing-to-membrane seal prevents bypass at rated pressure

Filtering every buffer before loading keeps your instrument running clean and uninterrupted. Reliable particulate removal protects your instruments and your data before each HPLC, UPLC, and dissolution run. Start a live chat with our customer support technicians for quick answers to your compatibility, sizing, and sterility questions.

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

1000

Pore Size (µm)

0.45

Prefilter (Yes/No)

No

Sterility

Nonsterile

Sterilization

Autoclavable 121°C

Volume Throughput (ml)

Up to 100ml

Wettability

Hydrophilic

• Culture Media Filtration - PES offers the fastest flow rates for viscous culture media while maintaining absolute sterility
• Ion Chromatography - The extremely low extractable profile of PES provides the clean baselines needed for sensitive IC analysis
• Biological Sample Prep - The low protein-binding nature of PES ensures maximum recovery of critical enzymes and proteins
• Life Science Applications - Ideal for filtering serum and plasma, where minimizing nonspecific binding is crucial for assay accuracy
• Environmental Monitoring - Ideal for removing particulates in water and wastewater analysis to ensure regulatory compliance
• Particulate Removal - Designed for removing particulates, this filter aids in protecting analytical instruments across diverse sample types