GD/XP Syringe Filter, PES, 0.45um (150 pcs)
Whatman SKU: 6994-2504

Whatman GD/XP Polyethersulfone (PES) Syringe Filters, 0.45 µm, 25 mm, 150/Pk - 6994-2504

Whatman applies the same process controls across its filtration portfolio, verifying rated performance at the production lot level. At the point of sample preparation, a syringe filter removes particulates before the sample reaches the instrument. PES accepts water-based reagents without surfactant preconditioning and keeps protein adsorption low across the run. Polypropylene construction maintains housing integrity through the filtration run and stays inert across common laboratory solvents. When sterile or particle-free preparation matters at the bench, the syringe filter delivers it with minimal added handling.

Technical Specifications

• Naturally hydrophilic surface wets without pre-wetting in aqueous applications
• Stable across the full pH 1 to 14 operating range
• Broad compatibility with aqueous buffers, aliphatic alcohols, glycols, and strong bases
• Absolute pore size rating gives consistent results across protocols
• High flow rate with low extractable background for clean preparations

Housing Specifications

• Reliable housing-to-membrane seal prevents bypass at rated pressure
• Low extractable contribution protects sensitive downstream analyses
• Medical-grade polypropylene with broad chemical compatibility
• Optimized internal geometry minimizes backpressure in service

Clarify your routine aqueous samples in a single pass and cut down on juggling multiple filter types at the bench. Consistent aqueous clarification keeps your sample preparation moving across the buffers and reagents your methods rely on. 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)

Connection Type

Luer-Lok/ Luer Slip

Diameter

25mm

Filtration Area

4.91cm²

Material

Polyethersulfone (PES)

Pack Count

150

Pore Size (µm)

0.45

Prefilter (Yes/No)

No

Sterility

Nonsterile

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
• 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
• Ion Chromatography - The extremely low extractable profile of PES provides the clean baselines needed for sensitive IC analysis
• Research & Development - Supports protocols that need to remove particulates, providing the ability to protect analytical instruments
• Quality Control Testing - Optimized for delivering reproducible results by removing particulates in standard pharmaceutical protocols