Polypropylene Membrane Filters, 20.0 um, 50mm, Nonsterile, 100 pcs/Pk SKU: SF18187

Polypropylene (PP) Membrane Filters - SF18187

Precision-manufactured hydrophobic membrane with a verified 20.0 pore structure delivers consistent retention performance across demanding laboratory filtration workflows. At its core, reproducible separation characteristics define the membrane structure, protecting downstream instruments and preserving sample integrity throughout the filtration process. Consequently, consistent surface properties across the full membrane area support uniform particle capture and reliable results in gravimetric, microscopic, and culture-based analytical workflows.

Material Specifications

• Depth-type PP configurations provide enhanced particle loading capacity for prefiltration in industrial chemical processing applications.
• Naturally hydrophobic, PP is well suited for air and gas venting applications where aqueous breakthrough must be prevented.
• Non-sterile configuration is suited for analytical sample preparation, mobile phase filtration, and other workflows where pre-sterilization is not required.
• Water-repellent membrane surface sustains airflow in venting applications while providing a defined barrier against liquid passage.
• Low extractable levels and chemical inertness make polypropylene a reliable medium for filtering reagents prior to titration and spectroscopic analysis.

Transitioning from qualitative screening to quantitative gravimetric analysis requires a membrane with documented tare weight consistency, and the manufacturing tolerances above ensure that your blank values remain within acceptable limits. Addressing this directly, chemical inertness across a broad solvent range lets you standardize on one membrane type for multiple aggressive solvent applications in your laboratory. Make the decision for consistency and reliability, ensuring that your laboratory maintains its reputation for high-quality, error-free output.

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

Bubble Point (psi)

≥0.1 psi (IPA, 25°C)

Color

White

Construction

Polypropylene (PP)

Diameter

50mm

Extractables

Very Low

Filtration Area

19.63cm²

Flow Rate

≥333 mL/min/cm²

Grid (Yes/No)

No

Material

Polypropylene (PP)

Maximum Operating Temperature (°C)

60°C

Pack Count

100

pH Range

1-14pH

Pore Size (µm)

20

Sterility

Nonsterile

Sterilization

Autoclave

Weight

0.49

Wettability

Hydrophobic

• Chemical Resis. Testing - Used as a test coupon to verify material compatibility with new synthetic fluids before scaling up production runs.
• Polymer Analysis - Filters dissolved polymer solutions for gel permeation chromatography (GPC) without shearing high molecular weight chains.
• Clarification Pre-filter - Placed on top of final membrane filters in vacuum funnels to catch heavy sediment and prevent rapid clogging.
• Coarse Particulate Removal - Efficiently clears visible debris from environmental samples, preparing them for finer analytical filtration steps.
• Hot Solvent Filtration - Withstands elevated temperatures during the filtration of hot saturated solutions in recrystallization protocols.
• Depth Filtration Stack - Provides a lofty depth matrix in stacked disc filters, increasing the dirt-holding capacity for viscous fluid streams.