---
title: "Septum: research glossary | Sable Peptides"
description: "A septum is a flexible rubber or elastomer seal that closes a vial or container while allowing access with a needle for adding or withdrawing liquids. Sept"
canonical: https://www.sablepeptides.co.uk/glossary/septum
publisher: Sable Peptides Limited (UK company 17488610)
note: Research use only. Not for human or veterinary use.
---

Glossary

# Septum

A septum is a flexible rubber or elastomer seal that closes a vial or container while allowing access with a needle for adding or withdrawing liquids. Septa in peptide vials maintain a closed system during reconstitution. Repeated punctures can compromise the seal, so aliquoting is often preferred.

Source: [agilent.com](https://www.agilent.com/en/product/vials-sample-containment/what-is-a-vial)

## Related terms

-   [Peptide](/glossary/peptide)
-   [Reconstitution](/glossary/reconstitution)

[Back to glossary A–Z](/glossary/terms)

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