Description
Silicone septa PTFE, N 11 are white sealing discs intended for laboratory vials and sample containers with N 11 neck finish. Each piece measures 11 mm outer diameter and 3 mm thickness, pairing an elastic silicone body with a PTFE facing that supports chemical resistance in sampling and injection steps. Delivered in packs of 50 pieces, they fit chromatography, autosampler, and broader analytical laboratory use where reliable resealing after needle penetration is essential. The PTFE layer reduces unwanted surface interaction with analytes, while the silicone core provides the flexibility required for repeated piercings during routine analysis and method work. These septa from manufacturer Macherey-Nagel align with widely used N 11 closure dimensions in analytical chemistry and quality-control settings. White colouring simplifies bench identification, and the practical pack size supports both development batches and everyday sample throughput. Compatible with standard N 11 screw or crimp configurations, they help preserve sample integrity from preparation to measurement within established vial systems.
This article is part of Vial caps & septa, in Vials, caps & septa.
Key features
- Pack size: 50 pc(s)
- Product type: Silicone septa with PTFE
- Neck size: N 11
- Outer diameter: 11 mm
- Thickness: 3 mm
- EAN: 4046681086991
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Questions about Silicon septa PTFE, N11
What is this article?
Silicon septa PTFE, N11 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.
