GD/X 25mm Syringe Filter, PTFE Filteration Medium, 0.2um (150 pcs)
Whatman SKU: 6875-2502

Whatman GD/X PTFE Syringe Filters, 0.2 µm, 25 mm, 150/Pk - 6875-2502

Whatman pairs a borosilicate fiber depth layer with the finishing membrane inside every GD/X unit, a construction meant to process loads heavy enough to clog a conventional one-stage filter. A single-use hydrophobic vent filter reaches sterilizing-grade retention on a vent line without the autoclave cycle or in-line housing a reusable gas filtration setup would require. Hydrophobic PTFE blocks aqueous ingress in vent and gas applications while suiting solvent filtration where other membranes fail and stays chemically inert against solvents, acids, and alkalis. Polyolefin construction sheds virtually no extractable material into the sample while staying inert across common laboratory solvents and sustains efficient flow on viscous samples. Downstream equipment and work areas stay protected from airborne bacterial contamination once the vent path runs through the membrane.

Membrane Characteristics

• UL 94 V-0 rating confirms the highest self-extinguishing classification
• Membrane integrity holds across repeated autoclave sterilization cycles at 121°C to 134°C
• Validated against an aerosol Brevundimonas diminuta bacterial challenge
• Node-fibril microstructure resists compaction under sustained operating pressure
• Low extractables keep the chromatographic background clean

Housing Characteristics

• Minimal intrinsic autofluorescence from the polypropylene housing supports background-sensitive fluorescence-based assay work downstream.
• Dilute aqueous acids, bases, and alcohols used in sample prep do not degrade the polypropylene housing
• Low moisture absorption keeps the housing dimensionally stable through humid storage and shipping
• Thermal-bonded construction keeps adhesives out of the fluid path

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 so your filter holds its integrity through the 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)

1.0 bar (15 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)

0.2

Prefilter (Yes/No)

Yes

Prefilter Material

Glass Microfiber (GMF)

Sterility

Nonsterile

Sterilization

Autoclavable 121°C

Volume Throughput (ml)

Up to 100ml

Wettability

Hydrophobic

• Aggressive Solvents - Clarifies chlorinated hydrocarbons and aromatics without membrane degradation, delivering pure filtrate quality consistently.
• Battery Electrolyte Prep - Clarifies lithium-ion battery electrolyte in carbonate solvents ahead of GC-MS purity and impurity analysis.
• Trace Metals Analysis - PTFE's low metal-extractable profile clarifies acid-digested samples for clean, low-background ICP-MS and ICP-OES results.
• Air Monitoring - Ensures precise capture of airborne particulates for environmental analysis in demanding atmospheric monitoring conditions.
• Cryogenic Fluids - Delivers consistent performance across extreme temperature ranges, filtering cryogenic liquids with dependable, reliable results.
• Extractables Testing - Clarifies packaging material organic solvent extracts ahead of LC-MS analysis, keeping background low for leachable detection.