9-425 Polypropylene Screw Cap with Silicone/PTFE Septum for Vials
Polypropylene cap with 9-425 thread and silicone/PTFE bilayer septum for airtight vial closure. Available in standard and pre-slit versions — pre-slit septum allows direct injection without manual piercing. PTFE faces the sample, ensuring chemical compatibility with organic solvents and aggressive compounds. Polypropylene body resists most common laboratory reagents. Typical applications include chromatography, sample storage and standard preparation.
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SKU:
22657
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€12.24
As low as:
9-425 Polypropylene Screw Cap with Silicone/PTFE Septum for Vials
Polypropylene screw cap with 9-425 thread and silicone/PTFE bilayer septum. Compatible with standard 9-425 threaded vials used in chromatography and sample storage. Available in standard and pre-slit versions.
Features
- Body material: Polypropylene (PP)
- Septum: Silicone/PTFE bilayer
- Thread: 9-425
- Pre-slit version: Pre-scored septum — direct injection with no resistance or needle deflection
Choosing the Right Version
The standard version suits sample storage and systems where the needle pierces the septum on each injection. The pre-slit version reduces penetration force and minimises the risk of needle deflection — particularly useful in autosamplers fitted with fine-gauge needles.
PTFE contacts the sample directly, broadening chemical compatibility compared to silicone-only septa. Suitable for organic solvents, dilute acids and volatile compounds.
Typical Applications
- Gas chromatography (GC) and liquid chromatography (HPLC)
- Sample storage and preservation
- Standard preparation and serial dilutions
- Headspace sampling systems
Specifications
- Thread: 9-425
- Body: Polypropylene
- Septum: Silicone/PTFE
- Versions: Standard and pre-slit
| Brand | METRIA |
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