Description
Septum N 20 silicone white/PTFE beige is a laminated sealing disc for N 20 closures used in chromatographic sampling and related laboratory vial applications. The white silicone body is paired with a beige PTFE facing that forms the chemical contact surface toward the sample, supporting clean needle penetration and reduced analyte interaction at the interface. Hardness is rated at 45° Shore A with a septum thickness of 3,0 mm, giving a compliant yet dimensionally stable seal suitable for repeated piercing under typical autosampler conditions. Each pack contains 100 pieces, allowing convenient replenishment of septa for crimp or other compatible N 20 assemblies without overstocking. Produced by manufacturer Macherey-Nagel, this silicone/PTFE combination is widely applied where moderate hardness and a defined PTFE barrier are preferred for analytical workflows. The beige PTFE layer helps protect the silicone from aggressive solvents while the silicone matrix maintains elasticity for reliable resealing. Laboratories can integrate these septa into routine GC, HPLC sample preparation, or general headspace-related setups that specify N 20 geometry, benefiting from consistent thickness and hardness across the pack.
This article is part of Vial caps & septa, in Vials, caps & septa.
Key features
- Pack size: 100 pc(s)
- Product type: N 20 septum
- Septum material: Silicone white/PTFE beige
- Hardness: 45° Shore A
- Septum thickness: 3,0 mm
- EAN: 4046681086519
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Questions about Septa N20 Sil w/PTFE bg, 45°, 3.0
What is this article?
Septa N20 Sil w/PTFE bg, 45°, 3.0 is the article on this page. Luminix Health distributes Macherey-Nagel for laboratory use. It sits in Vial caps & septa, inside Vials, caps & septa, in Chromatography equipment.
A vial cap and a septum have to match the vial neck: crimp, screw or snap, and the diameter. The septum material, PTFE/silicone or rubber, decides chemical resistance and how many times a needle can pierce it. A septum that sheds into the solvent becomes ghost peaks.
An autosampler vial is the small closed bottle a chromatograph picks up. The neck is crimp, screw or snap, and the cap and the septum have to be that neck. The septum is the part the needle pierces. A soft septum reseals. A septum that is wrong for the solvent swells or sheds particles into the sample. Inserts reduce the volume when the sample is scarce. The separation they feed is described with IUPAC names and PubChem data.
Which category should I open next?
The category is Vials, caps & septa. The sub-category is Vial caps & septa. The catalogue is Chromatography equipment.
Shelves beside this one are Chromatography accessories, Autosampler vials, Crimpers & decappers and Vial inserts.
What should I check before I order?
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
How does ordering and shipping work?
Luminix Health distributes this article from the heart of Europe. Delivery across Europe, two to five days when in stock. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.
