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.
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.
