Pura Disc 25mm PP Syringe Filters, 0.45um, 50 Pk
Whatman SKU: 6786-2504

Whatman Puradisc Polypropylene (PP) Syringe Filters, 0.45 µm, 25 mm, 50/Pk - 6786-2504

Whatman has built such a strong track record in published methods that laboratories default to citing its name in standardized protocols. Syringe filters mount on a syringe to clarify a sample in a single manual pass. The polypropylene membrane holds up to aggressive process chemistries while remaining compatible with organic and non-aqueous fluids and delivers nominal retention with high dirt-loading capacity. The polypropylene housing keeps the sample chemically unaltered across the pass while routing flow to minimize backpressure in service and holds its seal true run after run. Where bench-scale prep must move quickly from one sample to the next, the syringe filter adds a clarification step without slowing the workflow.

Technical Specifications

• Resists metal-ion leaching during acid-digested sample filtration for ppb-level trace-metal analysis.
• Wets through readily under modest differential pressure despite an inherently hydrophobic surface
• Saturated hydrocarbon backbone resists the hydrolytic degradation common in ester-linked filter media
• Sustains throughput on particulate-laden solvent samples
• Withstands maximum operating pressures near 72 psi with a burst rating around 116 psi, maintaining structural integrity under vacuum or positive-pressure processing

Housing Specifications

• Plasticizer-free polyolefin construction keeps the fluid path clean
• Optimized internal geometry minimizes backpressure in service
• Polypropylene housing retains its chemical integrity under vaporized hydrogen peroxide decontamination cycles used in aseptic processing isolators.
• Minimal ionic background from the polypropylene housing supports ion chromatography and trace-metal ICP-MS sample preparation.

Removing particulates from organic solvents and reagents before they move downstream keeps contamination out of your results. Solvent-stream filtration handles the solvents and reagents your methods rely on across the organic solvents and harsh reagents your methods use. Ask how Whatman's track record as a proven brand supports standardizing your filtration workflow.

For more information about chemical compatibility, please review our Chemical Compatibility Chart.

Bubble Point (psi)

(Hydrophobic)

Burst Pressure (psi)

75psi

Connection Type

Luer-Lok/ Luer Slip

Construction

Polypropylene

Diameter

25mm

Filtration Area

4.2cm²

Holdup Volume

<100µl

Material

Polypropylene (PP)

Maximum Operating Pressure

75psi

Maximum Operating Temperature (°C)

121°C

Pack Count

50

Pore Size (µm)

0.45

Prefilter (Yes/No)

No

Sterility

Nonsterile

Sterilization

Autoclavable 121°C

Volume Throughput (ml)

Up to 100ml

Wettability

Hydrophobic

• Sample Cleanup - Clarifies organic solvents during synthesis and purification steps, helping remove reaction byproducts and debris before analysis.
• Trace Metal Analysis Prep - Introduces minimal metal ion background into the filtrate, supporting sample prep ahead of ICP-OES or ICP-MS analysis.
• Mineral Acid Compatibility - Withstands concentrated hydrochloric acid and strong caustic bases in aqueous inorganic extraction workflows.
• Viscous Sample Prefilter - Handles heavy particulate loads with ease, acting as a dependable prefilter for viscous or dirty lab liquid samples.
• Prefiltration Support - Protects downstream membrane filters by capturing gross contaminants, extending the purification system life.
• Bulk Solvent Filtration - Handles pressure fluctuations during syringe filtration of bulk solvents and lab reagents reliably.