Sterile Syringe Filter PES 0.22um 4mm - Individually Packed 25

In this review we look at the Sterile Syringe Filter with a hydrophilic PES membrane and a 0.22um pore size, supplied in packs of 25. The bottom line: this product is aimed at lab technicians and researchers who need reliable, sterile filtration of buffers, media and reagents with clear traceability. The single biggest reason to buy is the combination of a hydrophilic PES membrane and individual gamma-irradiated packaging that supports sterile handling and quality control in routine life science workflows.

Key Features

• Hydrophilic PES membrane: Allows rapid, low-protein-binding filtration of aqueous solutions and most common buffers used in cell culture and molecular biology.
• 0.22um pore size: Provides sterile-grade filtration to remove bacteria and particulates from media, reagents and solutions.
• 4mm membrane diameter: Compact size suited to small-volume syringe filtration and quick sample processing without large dead volume.
• Sterile, gamma-irradiated packaging: Each filter is sterilized and individually packed to reduce contamination risk and simplify aseptic transfers.
• Individual expiry date: Simplifies QC tracking and inventory control in regulated lab environments or shared facilities.
• Certified non-pyrogenic: Designed to be biologically safe for many life science applications that require low endotoxin risk.

Who It's For

This product is best for laboratory staff, academic researchers and technicians who routinely filter small volumes of buffers, media and reagents before use. The compact 4mm membrane and hydrophilic PES make it practical for quick sample prep and sterile transfers where protein binding must be minimized.

Those working with large-volume filtration or who need specialized chemical compatibility beyond typical aqueous solutions should consider larger membrane formats or alternative materials. The single-use, small-diameter format is not intended for preparative-scale filtering of liters of solution.

Pros & Cons

Pros

• Individually packaged and gamma-irradiated for immediate sterile use and reduced contamination risk.
• Hydrophilic PES membrane with 0.22um pores offers efficient sterile filtration while limiting protein adsorption.
• Individual expiry dates aid laboratory QC and inventory tracking.

Cons

• Small 4mm membrane diameter limits throughput and makes these filters unsuitable for large-volume filtration tasks.

Specifications

Brand	ZHANXUBIO
Membrane material	PES (hydrophilic)
Pore size	0.22um
Membrane diameter	4mm
Pack quantity	25 sterile filters
Sterilization	Gamma irradiation
Safety	Certified non-pyrogenic; individual expiry dates

Our Verdict

The Sterile Syringe Filter PES 0.22um 4mm is a practical, cost-effective choice for labs that need individually packaged, sterile filters for small-volume preparation of buffers and reagents. Its hydrophilic PES membrane and individual expiry dates make it a dependable option for routine QC-conscious workflows, though teams needing higher throughput should choose larger formats.

Frequently Asked Questions

Are these filters sterile out of the package?
Yes, each filter is gamma-irradiated and individually packaged to provide sterile use straight from the pack.

Is the membrane suitable for protein solutions?
The hydrophilic PES membrane is low-protein-binding compared with some alternatives, making it suitable for many protein-containing buffers, but users should confirm compatibility for specific samples.

How is lot tracking handled?
Each filter includes an individual expiry date for easier QC and inventory tracking in regulated or shared laboratory settings.