Description
Complete tear-off caps for rolled-edge vials ND20 combine an aluminium shell with a silicone/PTFE septum in an UltraClean configuration for ND20 chromatography vials. The dual-layer septum pairs resilient silicone with a PTFE contact face, a common choice when laboratories need chemical resistance toward the sample while maintaining a dependable seal under crimp. Tear-off aluminium caps enable secure closure of rolled-edge ND20 necks and controlled access after sealing, supporting sample integrity from preparation through HPLC or related liquid-chromatography steps. Packs of 100 pieces, with a pack weight of 0,300 kg, suit routine replenishment of autosampler and bench consumables. Offered under the ROTH SELECTION range, these complete UltraClean caps are aimed at users who specify aluminium ND20 tear-off closures with silicone/PTFE septa rather than assembling shells and liners separately. Use them with matching rolled-edge ND20 vials when handling standards, extracts or injection-ready solutions that benefit from a PTFE-facing septum and a clean, ready-crimp closure format in analytical workflows.
This article is part of Vial caps & septa, in Vials, caps & septa.
Key features
- Pack size: 100 pc(s)
- Product type: Complete tear-off caps ND20
- Cap material: Aluminium
- Septum: Silicone/PTFE
- Grade: UltraClean
- Neck finish: ND20 rolled edge
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Questions about Compl. tear-off caps f. roll.-edge vials, ND20
What is this article?
Compl. tear-off caps f. roll.-edge vials, ND20 is the article on this page. Luminix Health distributes Carl Roth 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?
The technical information on this page is the manufacturer's sheet. Read that, not a rewritten specification.
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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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.