CryoSure® Cryogenic Vial Caps — HDPE, Green, 200/Bag (300-3900-G20)
These CryoSure® cryogenic vial caps are engineered for secure closure of cryogenic vials during ultra-low temperature storage, liquid nitrogen archiving, and freeze-thaw cycling. Molded from high-density polyethylene (HDPE), part number 300-3900-G20 delivers the flexibility and low-temperature toughness required to maintain a reliable seal under extreme cryogenic conditions. Supplied non-sterile in convenient 200/Bag bulk packaging, the green color coding supports at-a-glance sample organization in busy freezer inventories.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 300-3900-G20 |
| Product Line | CryoSure® |
| Type | Cryogenic Vial Caps |
| Material | High-Density Polyethylene (HDPE) |
| Color | Green |
| Sterility | Non-Sterile |
| Pack Size | 200/Bag |
| Country of Origin | USA |
Applications
- Replacement or spare caps for cryogenic vials stored in ultra-low temperature freezers (−80 °C and below)
- Liquid nitrogen vapor-phase and immersion-phase sample archiving
- Color-coded cryobank organization to differentiate sample groups, projects, or collection dates
- Re-capping cryogenic vials during sample retrieval and re-freezing workflows
- Biorepository and biobanking operations requiring reliable, high-volume cap inventory
Material & Chemical Resistance
High-density polyethylene (HDPE) remains tough and dimensionally stable across a broad temperature range, making it well suited to the mechanical stresses of repeated freeze-thaw cycling and cryogenic storage. HDPE offers good general chemical resistance to aqueous solutions, dilute acids and bases, and many common laboratory reagents. It is more rigid than low-density polyethylene while retaining enough flexibility to form a secure cap closure. Note that HDPE is not recommended for autoclaving and should be evaluated before use with concentrated oxidizing acids, aromatic solvents, or chlorinated solvents, which may cause swelling or degradation over time.
Quality & Procurement
Made in USA, Caplugs® Evergreen CryoSure® cryogenic vial caps are produced under ISO 9001 quality management from BPA-free, phthalate-free, latex-free HDPE resin. LabSupplies.com is an authorized dealer and ships from USA inventory, typically same business day for stocking items, with tiered pricing available for institutional, biobank, and grant-funded laboratories.
Frequently Asked Questions
Are these cryogenic vial caps sterile?
No — they are supplied non-sterile in 200/Bag bulk packaging. For applications requiring sterility, caps should be sterilized by an appropriate method compatible with HDPE prior to use; note that autoclaving is not recommended for HDPE.
Will HDPE caps hold up in liquid nitrogen storage?
HDPE is well established as a low-temperature material that retains toughness and flexibility at cryogenic temperatures, making it suitable for both vapor-phase and immersion-phase liquid nitrogen storage. Always verify compatibility with your specific vial format before committing large sample sets.
What is the purpose of the green color on these caps?
The green color allows for quick visual differentiation of sample groups, time points, or projects within a cryogenic storage rack or box, reducing retrieval errors in busy freezer inventories where multiple sample sets are stored together.