Description
Standard septa N 9 ST are laboratory sealing discs sized for N 9 closures used in chromatography and sample-vial applications. Each septum has an outer diameter of 9 mm and a thickness of 4 mm, providing a defined geometry for compatible caps and vials in analytical workflows. The ST standard type is intended as a general-purpose septum consumable for injection, storage, and sample-transfer steps where a consistent N 9 seal is required. Packed in units of 50 pieces, the septa support routine instrument work, method development, and high-throughput sample preparation without the need for oversized bulk packs. These standard N 9 ST septa from manufacturer Macherey-Nagel fit laboratories that standardise on the N 9 format for liquid chromatography, GC sample handling, or related vial systems. Select them as replacement septa or stock accessories whenever dimensional match to 9 mm outer diameter and 4 mm thickness is specified for the closure system in use.
This article belongs on Vial caps & septa, in Vials, caps & septa.
Key features
- Pack size: 50 pc(s)
- Product type: Standard septa N 9 ST
- Format: N 9
- Outer diameter: 9 mm
- Thickness: 4 mm
- EAN: 4046681087127
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Questions about Standard septa, N 9 ST
What is this article?
Standard septa, N 9 ST 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.
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Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. 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.