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We have developed a unique portfolio of consumables, each adapted to the different feed water quality requirements and to your various applications. To maintain your water system’s performance, it’s critical to replace your purification cartridges on time and with genuine ISO 9001-certified parts.

Catalog No. Product Net Price
PP2514250 Prefiltration before membrane filtration, hydrophobic, 25 µm 142 mm 383 
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  • Background Information
  • Millipore polypropylene filters are constructed of 100% virgin polypropylene media. They are ideally suited for general clarifying and prefiltration applications including solvents, deionized water and bioburden reduction. They also provide broad thermal compatibility.The prefilters provide high particle retention, high dirt holding capacity and low pressure drop. They are designed for filtration of organic solvents, but they can also be used - once properly wetted with alcohol - for the filtration of aqueous solutions.Features & Benefits:•Compatible with aggressive solvents •Prefilters have high dirt-holding capacity Applications:General Prefiltration and Clarification, Suitable for Organic Solvents
  • Catalogue Number
  • PP2514250
  • Chemistry
  • Polypropylene (PP)
  • Filter Code
  • PP25
  • Filter Color
  • White
  • Filter Diameter (⌀)
  • 142 mm
  • Filter Surface
  • Plain
  • Filter Type
  • Net filter
  • Material Size
  • 50
  • Pore Size
  • 25.0 µm
  • Wettability
  • Hydrophilic
PP2514250 Prefiltration before membrane filtration, hydrophobic, 25 µm 142 mm 383 
Add to Cart
  • Background Information
  • Millipore polypropylene filters are constructed of 100% virgin polypropylene media. They are ideally suited for general clarifying and prefiltration applications including solvents, deionized water and bioburden reduction. They also provide broad thermal compatibility.The prefilters provide high particle retention, high dirt holding capacity and low pressure drop. They are designed for filtration of organic solvents, but they can also be used - once properly wetted with alcohol - for the filtration of aqueous solutions.Features & Benefits:•Compatible with aggressive solvents •Prefilters have high dirt-holding capacity Applications:General Prefiltration and Clarification, Suitable for Organic Solvents
  • Catalogue Number
  • PP2514250
  • Chemistry
  • Polypropylene (PP)
  • Filter Code
  • PP25
  • Filter Color
  • White
  • Filter Diameter (⌀)
  • 142 mm
  • Filter Surface
  • Plain
  • Filter Type
  • Net filter
  • Material Size
  • 50
  • Pore Size
  • 25.0 µm
  • Wettability
  • Hydrophilic
FWMS01800 Milliseal Membrane Seal, PTFE, 18 mm 257 
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  • Catalogue Number
  • FWMS01800
  • Chemistry
  • Hydrophobic Polytetrafluoroethylene (PTFE)
  • Filter Color
  • White
  • Filter Diameter (⌀)
  • 18 mm
  • Filter Surface
  • Plain
  • Material Size
  • 1
  • Media
  • Milliseal®
  • Pore Size
  • 0.45 µm
  • Wettability
  • Hydrophobic
AN2504700 Polypropylene Prefilter, hydrophobic, 2.5 µm, 47 mm 88 
Add to Cart
  • Background Information
  • Millipore polypropylene filters are constructed of 100% virgin polypropylene media. They are ideally suited for general clarifying and prefiltration applications including solvents, deionized water and bioburden reduction. They also provide broad thermal compatibility.The prefilters provide high particle retention, high dirt holding capacity and low pressure drop. They are designed for filtration of organic solvents, but they can also be used - once properly wetted with alcohol - for the filtration of aqueous solutions.Features & Benefits:•Compatible with aggressive solvents •Prefilters have high dirt-holding capacity Applications:General Prefiltration and Clarification, Suitable for Organic Solvents
  • Catalogue Number
  • AN2504700
  • Chemistry
  • Polypropylene (PP)
  • Filter Code
  • AN25
  • Filter Color
  • White
  • Filter Diameter (⌀)
  • 47 mm
  • Filter Surface
  • Plain
  • Filter Type
  • Depth filter
  • Material Size
  • 100
  • Maximum Differential Pressure, bar (psid)
  • 5 bar (75 psid)
  • Maximum Operating Temperature
  • 90 °C
  • Pore Size
  • 2.5 µm
  • Thickness
  • 150 µm
  • Wettability
  • Hydrophobic
AN2504700 Polypropylene Prefilter, hydrophobic, 2.5 µm, 47 mm 88 
Add to Cart
  • Background Information
  • Millipore polypropylene filters are constructed of 100% virgin polypropylene media. They are ideally suited for general clarifying and prefiltration applications including solvents, deionized water and bioburden reduction. They also provide broad thermal compatibility.The prefilters provide high particle retention, high dirt holding capacity and low pressure drop. They are designed for filtration of organic solvents, but they can also be used - once properly wetted with alcohol - for the filtration of aqueous solutions.Features & Benefits:•Compatible with aggressive solvents •Prefilters have high dirt-holding capacity Applications:General Prefiltration and Clarification, Suitable for Organic Solvents
  • Catalogue Number
  • AN2504700
  • Chemistry
  • Polypropylene (PP)
  • Filter Code
  • AN25
  • Filter Color
  • White
  • Filter Diameter (⌀)
  • 47 mm
  • Filter Surface
  • Plain
  • Filter Type
  • Depth filter
  • Material Size
  • 100
  • Maximum Differential Pressure, bar (psid)
  • 5 bar (75 psid)
  • Maximum Operating Temperature
  • 90 °C
  • Pore Size
  • 2.5 µm
  • Thickness
  • 150 µm
  • Wettability
  • Hydrophobic
AG4502550 Silver Membrane Filter, 0.45 µm, 25 mm 419 
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  • Catalogue Number
  • AG4502550
  • Chemistry
  • Pure Silver
  • Contaminant of Interest
  • ChlorineCrystalline SilicaAmorphous SilicaVanadium OxidesVanadic AnhydrideVanadium PentoxideAnalysis of SilicaVanadic OxideVanadium SesquioxideVanadium TrioxideLeadAsbestosQuartz and Crysalobite
  • Filter Code
  • AG45
  • Filter Color
  • Light Tan
  • Filter Diameter (⌀)
  • 25 mm
  • Filter Surface
  • Plain
  • Filter Type
  • Screen filter
  • Flow Rate
  • >1.3 mL/min x cm²
  • Material Size
  • 50
  • Pore Size
  • 0.45 µm
  • Regulated Test Method Number
  • NIOSH 6011NIOSH 7500NIOSH 7501NIOSH 7504NIOSH 7505NIOSH 9000OSHA ID142
  • Thickness
  • 50 µm
  • Wettability
  • Hydrophilic
AG4502550 Silver Membrane Filter, 0.45 µm, 25 mm 419 
Add to Cart
  • Catalogue Number
  • AG4502550
  • Chemistry
  • Pure Silver
  • Contaminant of Interest
  • ChlorineCrystalline SilicaAmorphous SilicaVanadium OxidesVanadic AnhydrideVanadium PentoxideAnalysis of SilicaVanadic OxideVanadium SesquioxideVanadium TrioxideLeadAsbestosQuartz and Crysalobite
  • Filter Code
  • AG45
  • Filter Color
  • Light Tan
  • Filter Diameter (⌀)
  • 25 mm
  • Filter Surface
  • Plain
  • Filter Type
  • Screen filter
  • Flow Rate
  • >1.3 mL/min x cm²
  • Material Size
  • 50
  • Pore Size
  • 0.45 µm
  • Regulated Test Method Number
  • NIOSH 6011NIOSH 7500NIOSH 7501NIOSH 7504NIOSH 7505NIOSH 9000OSHA ID142
  • Thickness
  • 50 µm
  • Wettability
  • Hydrophilic
AN3H04700 Polypropylene Prefilter, hydrophobic, 30 µm, 47 mm 88 
Add to Cart
  • Background Information
  • Millipore polypropylene filters are constructed of 100% virgin polypropylene media. They are ideally suited for general clarifying and prefiltration applications including solvents, deionized water and bioburden reduction. They also provide broad thermal compatibility.The prefilters provide high particle retention, high dirt holding capacity and low pressure drop. They are designed for filtration of organic solvents, but they can also be used - once properly wetted with alcohol - for the filtration of aqueous solutions.Features & Benefits:•Compatible with aggressive solvents •Prefilters have high dirt-holding capacity Applications:General Prefiltration and Clarification, Suitable for Organic Solvents
  • Catalogue Number
  • AN3H04700
  • Chemistry
  • Polypropylene (PP)
  • Filter Code
  • AN3H
  • Filter Color
  • White
  • Filter Diameter (⌀)
  • 47 mm
  • Filter Surface
  • Plain
  • Filter Type
  • Depth filter
  • Material Size
  • 100
  • Maximum Differential Pressure, bar (psid)
  • 5 bar (75 psid)
  • Maximum Operating Temperature
  • 90 °C
  • Pore Size
  • 30.0 µm
  • Porosity %
  • 72%
  • Thickness
  • 150 µm
  • Wettability
  • Hydrophobic
AN3H04700 Polypropylene Prefilter, hydrophobic, 30 µm, 47 mm 88 
Add to Cart
  • Background Information
  • Millipore polypropylene filters are constructed of 100% virgin polypropylene media. They are ideally suited for general clarifying and prefiltration applications including solvents, deionized water and bioburden reduction. They also provide broad thermal compatibility.The prefilters provide high particle retention, high dirt holding capacity and low pressure drop. They are designed for filtration of organic solvents, but they can also be used - once properly wetted with alcohol - for the filtration of aqueous solutions.Features & Benefits:•Compatible with aggressive solvents •Prefilters have high dirt-holding capacity Applications:General Prefiltration and Clarification, Suitable for Organic Solvents
  • Catalogue Number
  • AN3H04700
  • Chemistry
  • Polypropylene (PP)
  • Filter Code
  • AN3H
  • Filter Color
  • White
  • Filter Diameter (⌀)
  • 47 mm
  • Filter Surface
  • Plain
  • Filter Type
  • Depth filter
  • Material Size
  • 100
  • Maximum Differential Pressure, bar (psid)
  • 5 bar (75 psid)
  • Maximum Operating Temperature
  • 90 °C
  • Pore Size
  • 30.0 µm
  • Porosity %
  • 72%
  • Thickness
  • 150 µm
  • Wettability
  • Hydrophobic
AP30034P0 Thick Absorbent Pad, 34 mm 45 
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  • Background Information
  • Cellulose support pads are used to reinforce filters in Millipore's monitors for contamination analysis. When saturated with growth medium, they can also be used for culturing microorganisms on membranes.To increase flow rate and throughput, our woven mesh spacers can be placed between filters in a serial filtration to prevent the downstream screen filter from "blinding" the upstream filter pores. Features & Benefits•Avoid membrane damage during high pressure or fast flow conditions •Spacers enable you to combine multiple stages of filtration into a single process step, saving time Applications:Air Monitoring, Environmental Monitoring, Aerosol Contamination Monitoring
  • Catalogue Number
  • AP30034P0
  • Chemistry
  • Cellulose Fiber
  • Filter Code
  • AP30
  • Filter Color
  • White
  • Filter Diameter (⌀)
  • 34 mm
  • Filter Surface
  • Plain
  • Filter Type
  • Depth filter
  • Material Size
  • 100
  • Pore Size
  • Not Applicable
  • Wettability
  • Hydrophilic

Overview

Analytical Sample Preparation Membrane Filtration Devices


Trust Merck membrane filtration devices for the collection and preparation of samples, mobile phases, and buffers to obtain the highest quality results from downstream analysis.


Whether you need to collect, separate, or remove contaminants from air or fluid samples prior to downstream analysis, our broad selection of syringe filters, membranes, filter holders and related filtration devices ensures that we have the right solution for your application.


Filter Membranes

Millex® Syringe Filters

Filtration Holders & Accessories



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