Pura Disc 4 mm PTFE Syringe Filters, 0.2um, 100/Pk
Whatman SKU: 6784-0402

Whatman Puradisc PTFE Syringe Filters, 0.2 µm, 4 mm, 100/Pk - 6784-0402

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 PTFE membrane withstands aggressive organics that degrade other media and handles concentrated acids and bases. Polypropylene construction resists chemical degradation from routine sample matrices while keeping sample purity intact through the filtration pass and routes flow to minimize backpressure in service. A vent or gas line stays free of airborne bacteria once a hydrophobic, sterilizing-grade membrane is in the path.

Technical Specifications

• Gas-venting and liquid-blocking function survives repeated autoclave sterilization cycles
• Absolute pore rating delivers reproducible retention across every protocol
• Validated against an aerosol Brevundimonas diminuta bacterial challenge
• Strong oxidizing agents like nascent chlorine and concentrated sodium hydroxide cause no attack
• Fully fluorinated carbon backbone resists ultraviolet and ozone degradation

Housing Specifications

• Dilute aqueous acids, bases, and alcohols used in sample prep do not degrade the polypropylene housing
• Thermal-bonded construction keeps adhesives out of the fluid path
• Minimal extractable release from the housing supports sensitive analytical work downstream
• Optimized internal geometry minimizes backpressure in service

Filtering aggressive solvents and reagents through a filter that holds up to the chemistry keeps your sample prep reliable. Reliable solvent prefiltration clears particulates from your organic samples so your downstream method starts with a clean sample. 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)

1.0 bar (15 psi) [IPA]

Burst Pressure (psi)

75psi

Connection Type

Luer-Lok/ Luer Slip

Construction

Polypropylene

Diameter

4mm

Filtration Area

0.2cm²

Holdup Volume

<10µl

Material

Polytetrafluoroethylene (PTFE)

Maximum Operating Pressure

75psi

Maximum Operating Temperature (°C)

100°C

Pack Count

100

Pore Size (µm)

0.2

Prefilter (Yes/No)

No

Sterility

Nonsterile

Sterilization

Autoclavable 121°C

Volume Throughput (ml)

Up to 2ml

Wettability

Hydrophobic

• Trace Metals Analysis - PTFE's low metal-extractable profile clarifies acid-digested samples for clean, low-background ICP-MS and ICP-OES results.
• Chemical Synthesis - Resists aggressive organic solvents and corrosive acids for compatibility with harsh synthetic reaction mixtures.
• Venting Applications - Protects vacuum pumps and vents bioreactors using a hydrophobic PTFE membrane that forms a reliable air barrier.
• Mobile Phase Prep - Extends column life by consistently removing particulates from organic HPLC mobile phases before every injection.
• Dye and Pigment Analysis - Clarifies dye solutions in DMF, NMP, and other aggressive organics ahead of spectrophotometric color strength testing.
• Fuel Analysis Prep - Clarifies gasoline and other petroleum samples ahead of gas chromatography, protecting injector ports from residue buildup.