DiamondPure 11mm Snap Caps for 2mL Chromatography Vials, Natural Cap with Red PTFE/Silicone Septum, 100/Pack
The DiamondPure Snap Cap for 2mL Chromatography Vials delivers a leak-resistant 11mm snap ring closure paired with a red PTFE/silicone septum for reliable HPLC, GC, and LC-MS autosampler workflows. Bonded layers resist solvent attack while preserving a clean seal for sample integrity during automated injection runs.
Technical Specifications
| Product Type | Snap cap for 2mL chromatography vial |
| Volume/Size | 11mm finish (fits 2mL standard-opening vials) |
| Material | Polypropylene cap, PTFE/silicone septum |
| Closure/Cap | Snap ring closure, natural cap |
| Graduation | Not applicable |
| Sterility | Non-sterile and sterile options available |
| Pack Size | 100 caps per pack |
Available Options
| 9020002CAP-SR-NR — Bag of 100 | 9020002CAP-SR-NR | $27.60 |
| 9020002CAP-SR-NR-S — Bag of 100 | 9020002CAP-SR-NR-S | $38.40 |
Applications
- Sealing 2mL autosampler vials for HPLC and UHPLC injection sequences
- GC sample containment with septum penetration for headspace and liquid sampling
- LC-MS sample storage where low-extractable septa protect trace analytes
- Pharmaceutical QC and stability sample archiving
- Environmental and food-safety residue analysis
- Sterile sample handling in regulated method validation workflows
Chemical Resistance
| Aqueous buffers | Excellent |
| Dilute acids | Excellent |
| Dilute bases | Good |
| Alcohols | Excellent |
| Acetonitrile | Good (PTFE-faced surface contact) |
| Aromatic solvents | Fair to good — limit prolonged exposure |
| Chlorinated solvents | Fair — short contact only |
Quality & Procurement
Purchase through labsupplies.com, an authorized Globe Scientific dealer shipping from US inventory. Each pack carries lot numbers that support traceability for CAP-, CLIA-, and ISO 15189-accredited laboratories. Institutional and grant-funded tiered pricing is available for high-volume chromatography programs.
Frequently Asked Questions
What vial finish do these snap caps fit?
They fit standard 11mm crimp/snap-finish 2mL chromatography vials. The snap ring secures over the bead without tooling, making them ideal for fast manual or robotic capping.
What is the septum material and why does it matter?
The septum is a bonded red PTFE/silicone layer. PTFE faces the sample for low extractables and broad solvent inertness, while silicone provides resealing after needle puncture.
Which option should I choose for sterile workflows?
Select SKU 9020002CAP-SR-NR-S, the sterile version. Use the non-sterile 9020002CAP-SR-NR for routine analytical sample handling where sterility is not required.
Are these caps compatible with autosampler needles?
Yes. The PTFE/silicone septum is designed for single needle penetration in most autosamplers; for repeated injections, use a fresh vial to maintain seal integrity.