Pura Disc 25mm H-PTFE Syringe Filters 0.45um, Hydrophilic, 50 Pk
Whatman SKU: 6772-2504

Whatman Puradisc Water-Wettable PTFE Syringe Filters, 0.45 µm, 25 mm, 50/Pk - 6772-2504

Whatman applies over a century of filtration media expertise, manufacturing under the quality standards that established its products as global laboratory references. Syringe filters mount on a syringe to clarify a sample in a single manual pass. Hydrophilic PTFE draws water-based and solvent samples through on contact while withstanding aggressive organic solvents without swelling and minimizes analyte loss to the surface. Polypropylene construction resists chemical degradation from routine sample matrices while preventing sample bypass under rated operating pressure and holds extractables low for sensitive analyses. Where analytical results depend on clean samples, syringe filtration removes particulates at the moment of preparation.

Technical Specifications

• Absolute pore-size rating gives consistent retention across protocols
• Chemically inert to aggressive organic solvents, strong acids, and alkalis
• Universal compatibility across aqueous buffers and organic solvents
• Water-wettable surface wets directly with both aqueous and organic samples
• Low protein binding preserves dilute analytes for maximum recovery

Housing Specifications

• Optimized internal geometry minimizes backpressure in service
• Thermal-bonded construction keeps adhesives out of the fluid path
• Stable across the full aqueous pH range in routine sample work
• Resists stress cracking from aqueous salt and buffer solutions

Sample clarification before injection is the cheapest insurance your chromatography system has. Upstream sample clarification keeps your separations clean and reproducible from sample preparation through final injection. Contact Tisch Scientific for technical guidance on selecting the right filtration product for your specific application requirements.

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

4.2cm²

Flow Rate

~30 (MeOH)

Holdup Volume

<100µl

Material

Hydrophilic Polytetrafluoroethylene (PTFE)

Maximum Operating Pressure

75psi

Maximum Operating Temperature (°C)

121°C

Pack Count

50

Pore Size (µm)

0.45

Prefilter (Yes/No)

No

Sterility

Nonsterile

Sterilization

Autoclavable 121°C

Volume Throughput (ml)

Up to 100ml

Wettability

Hydrophobic

• Aerosol Sampling - The hydrophobic nature of PTFE allows for gas venting and air monitoring applications in harsh environments
• Aggressive Solvent Filtration - PTFE is chemically inert, making it the only choice for filtering strong acids and bases
• Organic Mobile Phases - Ideal for filtering 100% organic solvents in HPLC and GC workflows without any membrane degradation
• Cryogenic Fluids - Remains functional and integral even at extreme temperatures, protecting sensitive equipment from damage
• General Laboratory Filtration - Increases workflow efficiency by protecting analytical instruments without sacrificing flow rates
• Analytical Sample Prep - Optimized to ensure data integrity by effectively removing particulates before instrumental analysis