Pura Disc 4 mm PTFE Syringe Filters, 0.45um, 100/Pk
Whatman SKU: 6784-0404

Whatman Puradisc PTFE Syringe Filters, 0.45 µm, 4 mm, 100/Pk - 6784-0404

Whatman manufactures under Cytiva's quality infrastructure, drawing on a filtration heritage that spans laboratory, environmental, and industrial applications. Syringe filters mount on a syringe to clarify a sample in a single manual pass. PTFE stays chemically inert against aggressive solvents, strong acids, and alkalis while holding consistent absolute retention at the rated pore size and filters aggressive organic solvents without breakdown. The polypropylene housing resists aqueous acids, bases, and alcohols while keeping the fluid path low in extractable contamination and holds a reliable seal against the membrane edge. When method reproducibility rests on consistent sample prep, syringe filtration holds that standard injection after injection.

Technical Specifications

• Stable across a wide operating temperature range for demanding methods
• Chemically inert against aggressive solvents, strong acids, and alkalis
• Low extractables keep the chromatographic background clean
• Absolute pore size rating gives consistent results across protocols
• Hydrophobic membrane repels water for gas, vent, and solvent filtration

Housing Specifications

• Resists aqueous acids, bases, and alcohols in routine sample prep
• Low extractable contribution protects sensitive downstream analyses
• Reliable housing-to-membrane seal prevents bypass at rated pressure
• Medical-grade polypropylene with broad chemical compatibility

Clarifying organic mobile phases before injection protects your chromatography while standing up to the solvent. Reliable solvent prefiltration clears particulates from your organic samples so your downstream method starts with a clean sample. Reach out to the Tisch Scientific team for application support, volume pricing, and technical assistance with your filtration product selection.

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

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)

0.45

Prefilter (Yes/No)

No

Sterility

Nonsterile

Sterilization

Autoclavable 121°C

Volume Throughput (ml)

Up to 2ml

Wettability

Hydrophobic

• Aggressive Solvent Filtration - PTFE is chemically inert, making it the only choice for filtering strong acids and bases
• Cryogenic Fluids - Remains functional and integral even at extreme temperatures, protecting sensitive equipment from damage
• Aerosol Sampling - The hydrophobic nature of PTFE allows for gas venting and air monitoring applications in harsh environments
• Organic Mobile Phases - Ideal for filtering 100% organic solvents in HPLC and GC workflows without any membrane degradation
• General Laboratory Filtration - Increases workflow efficiency by protecting analytical instruments without sacrificing flow rates
• Biological Fluid Analysis - Protects sensitive downstream instruments from removing particulates that can cause system failure