Pura Disc 25mm PTFE Syringe Filters, 0.2um, 1000 Pk
Whatman SKU: 6798-2502

Whatman Puradisc PTFE Syringe Filters, 0.2 µm, 25 mm, 1000/Pk - 6798-2502

Whatman has built such a strong track record in published methods that laboratories default to citing its name in standardized protocols. Each hydrophobic vent-rated filter carries manufacturer bacterial retention testing built into the design, letting a vent line stay in continuous service without repeating that testing on site between uses. Hydrophobic PTFE delivers sterilizing-grade gas and vent filtration at the rated pore size while blocking aqueous ingress in vent applications and stays chemically inert against solvents, acids, and alkalis. Polypropylene construction resists chemical degradation from routine sample matrices while sustaining structural integrity through elevated-temperature filtration operations 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

• Biological inertness resists enzymatic attack from proteases and lipases
• Fully fluorinated carbon backbone resists ultraviolet and ozone degradation
• Low non-specific protein binding preserves recovery of biomolecules and therapeutic proteins during filtration
• High porosity minimizes hold-up volume for small sample volumes
• Non-fibrous, fully synthetic structure sheds no fibers into filtrate

Housing Specifications

• Translucent housing wall allows visual confirmation of sample flow during filtration
• Minimal extractable release from the housing supports sensitive analytical work downstream
• Housing retains dimensional stability and seal integrity through elevated-temperature operation up to 121°C.
• Polypropylene density near 0.90 g/cm3 keeps housing weight low relative to denser engineering plastics

Handling the harsh solvents your methods demand means choosing a filter built to withstand what passes through it, run after run. Solvent-stream filtration handles the solvents and reagents your methods rely on across the organic solvents and harsh reagents your methods use. Ask our friendly customer service team to confirm the pore size, membrane, and sterility options your filtration application calls for.

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

1000

Pore Size (µm)

0.2

Prefilter (Yes/No)

No

Sterility

Nonsterile

Sterilization

Autoclavable 121°C

Volume Throughput (ml)

Up to 100ml

Wettability

Hydrophobic

• UV Spectroscopy - Clarifies solvent-based samples before UV/Vis analysis, removing scattering particulates for precise, reliable absorbance readings.
• Fuel Analysis Prep - Clarifies gasoline and other petroleum samples ahead of gas chromatography, protecting injector ports from residue buildup.
• Aggressive Solvents - Clarifies chlorinated hydrocarbons and aromatics without membrane degradation, delivering pure filtrate quality consistently.
• Air Monitoring - Ensures precise capture of airborne particulates for environmental analysis in demanding atmospheric monitoring conditions.
• Pump Protection - Acts as a hydrophobic barrier that protects vacuum pumps from corrosive moisture and particulate damage.
• Mobile Phase Prep - Extends column life by consistently removing particulates from organic HPLC mobile phases before every injection.