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Millex-GP Syringe Filter Unit, 0.22 µm, polyethersulfone, 33 mm, gamma sterilized

A 33 mm diameter sterile syringe filter with a 0.22 µm pore size hydrophilic Polyethersulfone (PES) membrane.

disposable syringe filter, sterile syringe filter, syringe filter


modified acrylic
modified acrylic housing
polyethersulfone membrane

Quality Level


sterile; γ-irradiated

product line



holdup volume< 0.1 mL




available only in Canada, Japan, Europe, Australia, Malaysia, USA, Thailand


10 bar max. inlet pressure (145 psi)
200 mL sample volume
45 °C max. temp.


sterile filtration: suitable (sterilization of drugs or aqueous solutions administered intravenously)
sterile filtration: suitable (sterilization of tissue culture media, protein solutions or aqueous solutions)


27 mm


3.3 cm

filter diam.

33 mm

filtration area

4.5 cm2


Express PLUS

pore size

0.22 μm pore size


sample type induced pluripotent stem cell(s)
sample type neural stem cell(s)
sample type epithelial cells
sample type: human embryonic stem cell(s)
sample type pancreatic stem cell(s)
sample type: mouse embryonic stem cell(s)
sample type mesenchymal stem cell(s)
sample type cardiac stem cell(s)
sample type hematopoietic stem cell(s)


female Luer-Lok® inlet connection
female Luer-Lok® inlet fitting
male Luer outlet slip

shipped in


General description

Filter Code: GP
Sterile Millex filter units are available in a larger 33 mm housing with either MCE, PVDF or PES membranes.

Faster flow rate:
The larger filter surface area increases flow rate and throughput. It also makes it easier to filter solutions because it reduces the pressure required to empty the syringe.

Higher operating pressure:

Millex filters have a maximum housing pressure of 10.5 bar (150 psig), which means you can filter solutions faster than before.


The color-coded band on the Millex housing clearly indicates which membrane is inside.

Manufactured for reliable performance:

Millex filters are manufactured in a controlled environment using an automated process. Human hands never touch the filter during assembly. A Certificate of Quality included in each box describes Millipore′s quality standards in detail.

Choice of membranes:
Millex filters are available with three membranes: Millipore Express (PES) membrane, mixed cellulose esters (MCE), and Durapore (PVDF).
- Millex-GP filters feature Millipore Express (PES) membrane, which provides a unique combination of speed and six times less protein binding than competitive PES membranes. Millex-GP filters are recommended for sterile filtering protein solutions, tissue culture media, buffers and additives.

- Millex filters with Durapore (PVDF) membrane are the lowest protein-binding syringe filters available. Use them to filter protein solutions. The 0.2 µm filters are sterilizing grade. Larger pore sizes are for clarification and prefiltration.

- Millex-MF filters feature mixed cellulose esters (MCE) membrane, which provides reliable, general purpose filtration of water or other aqueous solutions. The 0.2 µm filters are sterilizing grade. Larger pore sizes are for clarification and prefiltration.


50, 250 pkg


Direct patient care: Yes, location dependent

Physical form

Color Code: Green

Preparation Note

Sterilization Method
Gamma irradiation

Other Notes

Directions for Use

  • Organism Retention: Microorganisms
  • Mode of Action: Filtering
  • Application: Sterile Filtration
  • Intended Use: Sterilization of aqueous solutions including medical applications depending on country/region
  • Instructions for Use: Please refer to Instructions for Use section of Millex® syringe filter user guide
  • Storage Statement: Store in dry location
  • Disposal Statement: Dispose of in accordance with applicable federal, state and local regulations.

Legal Information

EXPRESS PLUS is a trademark of Merck KGaA, Darmstadt, Germany
Luer-Lok is a registered trademark of Becton-Dickinson & Co.
Millex is a registered trademark of Merck KGaA, Darmstadt, Germany

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Quality

Enter Lot Number to search for Certificate of Quality (COQ).

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