Pura Disc 25mm PTFE Syringe Filters, 0.45um, 1000 Pk
Whatman SKU: 6798-2504

Whatman Puradisc PTFE Syringe Filters, 0.45 µm, 25 mm, 1000/Pk - 6798-2504

Whatman's brand recognition and documented performance history support specification in standardized analytical methods. Across analytical workflows, the syringe filter is where particulates leave the sample stream. Hydrophobic PTFE repels water while passing gases and solvents freely and resists attack from the harshest process chemistries. The polypropylene housing routes flow to minimize backpressure in service and stays inert across common laboratory solvents. When chromatographic methods demand particle-free injections, point-of-use syringe filtration clarifies the sample before it reaches the column.

Technical Specifications

• Absolute pore size rating gives consistent results across protocols
• Chemically inert against aggressive solvents, strong acids, and alkalis
• Filters aggressive organic solvents without swelling or breakdown
• Low extractables keep the chromatographic background clean
• Hydrophobic membrane repels water for gas, vent, and solvent filtration

Housing Specifications

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

Filtering aggressive solvents and reagents through a filter that holds up to the chemistry keeps your sample prep reliable. Solvent-stream filtration handles the solvents and reagents your methods rely on so your filter holds its integrity through the run. Request a quality certificate, lot documentation, or a blanket-order quote from the Tisch Scientific support team.

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

Polytetrafluoroethylene (PTFE)

Maximum Operating Pressure

75psi

Maximum Operating Temperature (°C)

121°C

Pack Count

1000

Pore Size (µm)

0.45

Prefilter (Yes/No)

No

Sterility

Nonsterile

Sterilization

Autoclavable 121°C

Volume Throughput (ml)

Up to 100ml

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
• Organic Mobile Phases - Ideal for filtering 100% organic solvents in HPLC and GC workflows without any membrane degradation
• Aerosol Sampling - The hydrophobic nature of PTFE allows for gas venting and air monitoring applications in harsh environments
• General Laboratory Filtration - Increases workflow efficiency by protecting analytical instruments without sacrificing flow rates
• Research & Development - Supports protocols that need to remove particulates, providing the ability to protect analytical instruments