Pura Disc 25mm PTFE Syringe Filters, 0.2um, 50 Pk
Whatman SKU: 6784-2502

Whatman Puradisc PTFE Syringe Filters, 0.2 µm, 25 mm, 50/Pk - 6784-2502

Whatman's filtration expertise, refined across a century-plus of disciplined manufacturing, has made its name synonymous with laboratory-grade quality worldwide. A syringe filter with a hydrophobic vent-rated membrane keeps gas and vent lines free of microbial ingress. The hydrophobic PTFE membrane provides bacterial retention in gas and vent streams while handling concentrated acids and strong bases and blocks aqueous ingress in vent applications. The polypropylene housing holds its seal true run after run and routes flow to minimize backpressure in service. Downstream equipment and work areas stay protected from airborne bacterial contamination once the vent path runs through the membrane.

Technical Specifications

• PTFE retains flexibility and mechanical toughness from cryogenic temperatures near -268°C up to a continuous service limit of 260°C, spanning frozen sample storage through elevated-temperature method work.
• Stable across a wide operating temperature range for demanding methods
• Low non-specific protein binding preserves recovery of biomolecules and therapeutic proteins during filtration
• PTFE's absolute pore rating delivers reproducible retention across every protocol
• Hydrophobic PTFE retains its gas-venting, liquid-blocking function through repeated autoclave sterilization cycles.

Housing Specifications

• Polypropylene density near 0.90 g/cm3 keeps housing weight low relative to denser engineering plastics
• Burst pressure rating provides a wide safety margin above the rated maximum operating pressure.
• Impact-tolerant polypropylene body withstands routine bench handling without damage
• Housing tolerates elevated-temperature aqueous and solvent sample filtration up to about 80°C without softening.

Handling the harsh solvents your methods demand means choosing a filter built to withstand what passes through it, run after run. Reliable solvent prefiltration clears particulates from your organic samples before it moves on to your next process step. Ask our team about Whatman's performance credentials before you commit to a filtration standard requiring documented quality.

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

4.2cm²

Flow Rate

~20 (MeOH)

Holdup Volume

<100µl

Material

Polytetrafluoroethylene (PTFE)

Maximum Operating Pressure

75psi

Maximum Operating Temperature (°C)

121°C

Pack Count

50

Pore Size (µm)

0.2

Prefilter (Yes/No)

No

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.
• Cryogenic Fluids - Delivers consistent performance across extreme temperature ranges, filtering cryogenic liquids with dependable, reliable results.
• Chemical Synthesis - Resists aggressive organic solvents and corrosive acids for compatibility with harsh synthetic reaction mixtures.
• UV Spectroscopy - Clarifies solvent-based samples before UV/Vis analysis, removing scattering particulates for precise, reliable absorbance readings.
• Extractables Testing - Clarifies packaging material organic solvent extracts ahead of LC-MS analysis, keeping background low for leachable detection.
• Dissolution Testing - Stops the dissolution reaction and clarifies samples, with low API binding for accurate potency quantitation.