GD/XP Syringe Filter, PTFE Filteration Medium, 0.45um (150 pcs)
Whatman SKU: 6974-2504

Whatman GD/XP PTFE Syringe Filters, 0.45 µm, 25 mm, 150/Pk - 6974-2504

Whatman fits two graded polypropylene prefilter layers into the GD/XP housing, a construction that serves samples where trace-metal accuracy depends on what the filter itself contributes to the result. Because each syringe filter is dedicated to one sample, a failed or contaminated filtration never delays the next analyst's run waiting on a shared holder. PTFE suits solvent and reagent filtration where other membranes fail while repelling water and passing gases and solvents freely and reaches the same absolute retention on every run. Polyolefin construction sheds virtually no extractable material into the sample while resisting degradation from routine sample matrices and maintains structural integrity through elevated-temperature sample preparation. When chromatographic methods demand particle-free injections, the column stays clean from run to run, protecting method performance and column life.

Membrane Characteristics

• Solvent tolerance includes full-strength tetrahydrofuran and chlorinated solvents such as dichloromethane
• Non-wetting pore surface blocks liquid water while passing water vapor freely
• Membrane integrity holds across repeated autoclave sterilization cycles at 121°C to 134°C
• Chemical resistance spans the full pH 1 to 14 range
• Absolute pore rating delivers reproducible retention across every protocol

Housing Characteristics

• Minimal intrinsic autofluorescence from the polypropylene housing supports background-sensitive fluorescence-based assay work downstream.
• Low moisture absorption keeps the housing dimensionally stable through humid storage and shipping
• Impact-tolerant polypropylene body withstands routine bench handling without damage
• Resists stress cracking from aqueous salt and buffer solutions

Removing particulates from organic solvents and reagents before they move downstream keeps contamination out of your results. Reliable solvent prefiltration clears particulates from your organic samples from reaction mixtures and crude extracts through further processing. Bulk pricing kicks in on larger filtration orders, so ask the Tisch Scientific team for a quote.

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

Polytetrafluoroethylene (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

Polypropylene (10µm + 5µm)

Sterility

Nonsterile

Sterilization

Autoclavable 121°C

Volume Throughput (ml)

Up to 100ml

Wettability

Hydrophobic

• Photoresist Filtration - Clarifies photoresist solutions in organic casting solvent ahead of spin-coating, reducing particulate defect risk.
• Solvent Purity Prep - Filters harsh organic solvents through a PTFE membrane, preserving chemical resistance and purity for trace-level analysis.
• Battery Electrolyte Prep - Clarifies lithium-ion battery electrolyte in carbonate solvents ahead of GC-MS purity and impurity analysis.
• Air Monitoring - Ensures precise capture of airborne particulates for environmental analysis in demanding atmospheric monitoring conditions.
• Aggressive Solvents - Clarifies chlorinated hydrocarbons and aromatics without membrane degradation, delivering pure filtrate quality consistently.
• Dissolution Testing - Stops the dissolution reaction and clarifies samples, with low API binding for accurate potency quantitation.