CryoSure® Cryogenic Vial Caps — HDPE, Green, Non-Sterile, 1000/Bag (300-3900-G2K)
These CryoSure® cryogenic vial caps are molded from high-density polyethylene (HDPE) and designed for secure closure of cryogenic vials during ultra-low temperature and liquid nitrogen storage. Supplied in green for straightforward color-coded sample organization, part number 300-3900-G2K is available in a convenient bulk pack of 1000 caps per bag for high-throughput freezing workflows. The non-sterile designation makes them well suited for applications where sterility is not a requirement.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 300-3900-G2K |
| Product Line | CryoSure® |
| Type | Cryogenic Vial Caps |
| Material | High-Density Polyethylene (HDPE) |
| Color | Green |
| Sterility | Non-Sterile |
| Pack Size | 1000/Bag |
| Country of Origin | USA |
Applications
- Replacement or supplemental capping of cryogenic vials in biorepository and biobanking workflows
- Color-coded organization of frozen sample collections by sample type, donor group, or study cohort
- Long-term storage of biological specimens at ultra-low temperatures, including liquid nitrogen vapor phase
- High-volume cryopreservation operations requiring bulk cap availability
- Re-capping of cryovials after aliquoting or intermediate sample access
Material & Chemical Resistance
High-density polyethylene (HDPE) provides excellent general chemical resistance to aqueous solutions, dilute acids and bases, and many common laboratory reagents, making it a reliable choice for demanding cryogenic environments. HDPE maintains meaningful flexibility and toughness even at very low temperatures, which helps preserve a secure seal on cryogenic vials. Note that HDPE is not recommended for autoclaving, and compatibility with concentrated oxidizing acids, aromatic solvents, and chlorinated solvents should be evaluated before use.
Quality & Procurement
Made in USA, Caplugs® Evergreen CryoSure® vial caps are produced under ISO 9001 quality management from BPA-free, phthalate-free, latex-free resin. LabSupplies.com is an authorized dealer of Caplugs® Evergreen products and ships from USA inventory, with tiered volume pricing available for biobanks, core facilities, and procurement teams managing large freezing programs.
Frequently Asked Questions
Are these cryogenic vial caps sterile?
No — the 300-3900-G2K caps are supplied non-sterile in bulk 1000/Bag packaging. For applications requiring sterility, additional aseptic handling or a sterile-format product should be considered.
Can HDPE caps withstand liquid nitrogen temperatures?
HDPE retains meaningful toughness and flexibility at cryogenic temperatures, making it a well-established material choice for low-temperature vial closures. Always confirm compatibility with your specific storage conditions and vial format before committing to large-scale use.
What is the benefit of the green color?
The green color enables quick visual differentiation within a freezer box or rack, supporting color-coded sample management systems that reduce the risk of mix-ups when working with multiple sample groups or studies.