Sterile Syringe Filter Hydrophilic PES 0.22um 4mm - Lab Grade

In this review the Sterile Syringe Filter Hydrophilic PES 0.22um 4mm is assessed for routine lab filtration tasks; the bottom line is that it is aimed at life science labs that need reliable, sterile single-use filters for buffers, media and reagents. The review finds the major reason to buy is consistent, certified sterility and convenient traceability thanks to individual integrity testing, gamma irradiation and per-unit expiry dating, which simplifies QC tracking when filtering small volumes prior to analysis or cell culture work.

Key Features

• Sterile packaging: Each filter is individually packaged to preserve sterility until use and reduce cross-contamination risk.
• Hydrophilic PES membrane: The PES membrane is suitable for aqueous solutions, enabling fast flow rates and low protein binding for routine buffer filtration.
• 0.22 um pore size: Provides effective removal of bacteria and particulates for sterile filtration of media and reagents.
• Gamma irradiated and non-pyrogenic: Gamma irradiation and certification as non-pyrogenic reduce biological safety concerns for sensitive applications.
• Individual expiry date: Per-unit expiry dating simplifies QC documentation and traceability for regulated lab environments.
• Compact 4 mm membrane: The small membrane diameter is convenient for small-volume sample preparation and minimizes dead volume.

Who It's For

The filter is best for laboratory technicians, researchers and QA staff who frequently filter small volumes of aqueous buffers, media or reagent solutions before downstream assays or sterile procedures. Its hydrophilic PES membrane and sterile, individually packaged format make it practical for routine sample prep and aseptic work in life science labs.

It is not intended for filtration of solvents incompatible with PES or for applications requiring larger membrane areas or specialized low-binding polymers; teams needing higher throughput or large-volume filtration should consider larger syringe filter formats or in-line assemblies.

Pros & Cons

Pros

• Individually packaged and gamma irradiated for reliable sterility and reduced contamination risk.
• Hydrophilic PES membrane with 0.22 um pore size offers good flow for aqueous solutions and efficient bacterial removal.
• Individual expiry dates aid QC traceability in regulated workflows.
• Compact 4 mm diameter suits small-volume filtering and minimizes sample loss.

Cons

• Small membrane area limits throughput and may require multiple filters for larger volumes.
• Designed for aqueous use; not suitable for all organic solvents or specialized filtration needs.

Specifications

Brand	ZHANXUBIO
Membrane material	PES (hydrophilic)
Pore size	0.22 um
Membrane diameter	4 mm
Packaging	Sterile, individually packaged, gamma irradiated
Safety	Certified non-pyrogenic and biologically safe
Traceability	Individual expiry date per unit

Our Verdict

The Sterile Syringe Filter Hydrophilic PES 0.22um 4mm is a solid choice for labs that need small-volume sterile filtration with clear QC traceability. Its hydrophilic PES membrane, sterile individual packaging and gamma irradiation make it good value for routine buffer, media and reagent filtering, while the small membrane area means it is best for sample prep rather than high-volume filtration.

Frequently Asked Questions

Are these filters sterile out of the package?
Yes, each unit is individually packaged and gamma irradiated to ensure sterility until opened.

Can I use them with organic solvents?
They are hydrophilic PES membranes intended for aqueous solutions; compatibility with organic solvents is limited and should be checked before use.

Do the filters have an expiry date?
Yes, each filter has an individual expiry date for QC tracking and traceability.