GD/X 25mm Syringe Filter, PTFE Filteration Medium, 0.45um (150 pcs)
Whatman SKU: 6874-2504

Whatman GD/X PTFE Syringe Filters, 0.45 µm, 25 mm, 150/Pk - 6874-2504

Whatman ties GD/X prefiltration performance to one closely held fiber-grade standard applied at every production run, keeping results repeatable from one manufacturing lot to the next. Syringe filters replace the separate holder and vacuum apparatus of bulk filtration with a single disposable unit, eliminating cleaning between samples. The hydrophobic PTFE membrane suits gas, vent, and solvent-stream filtration while suiting solvent filtration where other membranes fail and resists attack from the harshest process chemistries. The polypropylene housing presses snugly against the membrane during the pass and keeps sample purity intact through the filtration pass. For routine sample preparation across many methods, each analytical run starts with a consistent, particle-free sample without added hardware or a cleaning step.

Membrane Characteristics

• Inert composition offers no nutrient source for microbial growth
• Gas-venting and liquid-blocking function survives repeated autoclave sterilization cycles
• High porosity minimizes hold-up volume for small sample volumes
• Solvent tolerance includes full-strength tetrahydrofuran and chlorinated solvents such as dichloromethane
• UL 94 V-0 rating confirms the highest self-extinguishing classification

Housing Characteristics

• Polypropylene density near 0.90 g/cm3 keeps housing weight low relative to denser engineering plastics
• Optimized internal geometry minimizes backpressure in service
• Housing retains dimensional stability and seal integrity through elevated-temperature operation up to 121°C.
• Impact-tolerant polypropylene body withstands routine bench handling without damage

Filtering aggressive solvents and reagents through a filter that holds up to the chemistry keeps your sample prep reliable. Solvent-stream filtration handles the solvents and reagents your methods rely on across the organic solvents and harsh reagents your methods use. Start a live chat with our customer support technicians for real-time updates on product availability, lead time, or your order status.

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

Bubble Point (psi)

0.6 bar (9 psi) [IPA]

Burst Pressure (psi)

75psi

Connection Type

Luer-Lok/ Luer Slip

Construction

Polypropylene

Diameter

25mm

Filtration Area

4.6cm²

Holdup Volume

1.4ml

Material

GF/PTFE

Maximum Operating Pressure

75psi

Maximum Operating Temperature (°C)

121°C

Pack Count

150

Pore Size (µm)

0.45

Prefilter (Yes/No)

Yes

Prefilter Material

Glass Microfiber (GMF)

Sterility

Nonsterile

Sterilization

Autoclavable 121°C

Volume Throughput (ml)

Up to 100ml

Wettability

Hydrophobic

• Air Monitoring - Ensures precise capture of airborne particulates for environmental analysis in demanding atmospheric monitoring conditions.
• Spirits Congener Analysis - Clarifies distilled spirits samples ahead of GC analysis, protecting columns from residue during congener profiling.
• Mobile Phase Prep - Extends column life by consistently removing particulates from organic HPLC mobile phases before every injection.
• Environmental Prep - Clears heavy particulate loads from solvent-based soil and sediment extracts, pairing a glass prefilter with a PTFE membrane.
• Chemical Synthesis - Resists aggressive organic solvents and corrosive acids for compatibility with harsh synthetic reaction mixtures.
• Pump Protection - Acts as a hydrophobic barrier that protects vacuum pumps from corrosive moisture and particulate damage.