SKU: 56740387263

PALL 4521 Acrodisc Syringe Filters with PTFE Membrane - 0.2 µm, 25mm (1000/pkg)

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Description

PALL 4521 Acrodisc Syringe Filters with PTFE Membrane - 0.2 µm, 25mm (1000/pkg)Syringe filters are used in analytical chemistry applications to remove particulate contamination prior to analysis. Filtering a sample prior to sample injection into analytical instrumentation will help protect sensitive parts of the instrument from particulate build up and reduce system downtime. Sample filtration using syringe filters containing 0. 45 m (HPLC) or 0. 2 m (UHPLC) pore size membranes will also extend the life of chromatography columns

Syringe filters are used in analytical chemistry applications to remove particulate contamination prior to analysis. Filtering a sample prior to sample injection into analytical instrumentation will help protect sensitive parts of the instrument from particulate build-up and reduce system downtime. Sample filtration using syringe filters containing 0.45 μm (HPLC) or 0.2 μm (UHPLC) pore size membranes will also extend the life of chromatography columns by preventing particulate from blocking the flow path between the column packing.

PTFE membrane is highly chemically compatible for the filtration of harsh solvents that can destroy other membrane materials. PTFE is a hydrophobic membrane, so it will repel water and is not suitable for the filtration of aqueous solutions.

As well as being suitable for the filtration of organic solvents in applications such as HPLC and UHPLC sample preparation, the hydrophobic nature of the PTFE membrane makes these syringe filters ideal to use in gas filtration or as a moisture barrier in venting applications.

25 mm Standard Acrodisc Syringe Filters

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SKU: 56740387263

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4.2 ★★★★★
Based on 20 reviews
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nancy lischer
Boise, US
★★★★★ 1
My last Timex and why.
Color: Black/Gray/Digital, Color: Black/Gray/Digital
New edit. Upon further reflection, I’ve only had, a couple of exploratory years with Swatch excepted, Timex watches. My first one was when my mother replaced the Chicita Banana “tickity tock” sticker with a real Timex wind up watch before my first Cub Scout camp. In addition to many other Timex products, I’ve had these Ironman watches for the past 25+years. Usually the band wears out and can’t be replaced after three or four years. This particular watch fell apart less than six weeks old. It wasn’t hit by impact. It just came apart while I was driving down the road. I wonder if they’ve changed their manufacturing process. See photo for details. What is truly infuriating is that rather than replacing it, because it is truly a warranty issue, the told me to ship it to their offshore repair facility (which could take 3-5 months) and pay what might be half the value of the watch. Things happen, but the intentional friction they have created to avoid their obligations borders on malpractice and speaks to their indifference toward customer experience and subsequent lifetime value.
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Reviewed in the United States on September 4, 2025
M
Verified Purchase
mike
Louisville, US
★★★★★ 5
Good watch
Color: Black/Black/Digital
Bought for my 8 yo, durable
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Reviewed in the United States on October 19, 2025
K
Verified Purchase
Katelyn Vincent
Louisville, US
★★★★★ 5
As expected
Color: Gray/Gray/Digital
Just an old school digital timex. Tried and true. Has both 12hr and 24hr function on the time setting. Has a standard stop watch and timer. The battery is great, just as it always is on a timex. Good water resistance and very easy to use. Overall very good watch for the price!
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Reviewed in the United States on July 6, 2025
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Verified Purchase
David C. Gilliam
Charlottesville, US
★★★★★ 2
Can’t read numbers
Color: Gray/Gray/Digital
Numbers are too small to tread on a 44mm watch
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Reviewed in the United States on May 5, 2026
H
Verified Purchase
hal lifson
Alexandria, US
★★★★★ 5
Love the Timex Ironman Shock watches!!
Color: Black/Black/Digital
I really like the Timex Ironman Shock watches. They are very durable and reliable. Simple to use and modeled after the. Original Ironman watches of the late 80s and 90s. Buttons are clearly marked and easy to press. They used to make many colors of this Shock model of the watch inc a cool shiny red color my wife still has . I have been a runner many many years and at 65, am still out although a lot slower than my 20s. But Timex Ironman watches have. Been my constant companion on the roads and track for 35 years now.
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Reviewed in the United States on March 27, 2026

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