External Thread Cryogenic Tube

External thread cryogenic tubes combine low-temperature resistance, leak-proof sealing, and convenient sample management.

• Made of medical-grade polypropylene (PP) suitable for cryogenic storage.

• Tolerates gas-phase liquid nitrogen temperatures down to -196°C.

• External screw cap with built-in silicone O-ring prevents leakage and contamination.

• Caps and tubes from the same PP batch ensure uniform thermal expansion and tight sealing.

• Color-coded caps with embedded small lids enable easy sample identification.

• Large white labeling area supports clear marking and barcoding.

• Curved bottom design allows centralized liquid handling and reduces residue.

• Available in ordinary grade and PCR-grade; PCR-grade is free from DNA, DNase, RNase, and endotoxin.

• Sterilized by gamma irradiation to maintain sterility and sample safety.

• Smooth screw threads make capping and uncapping efficient in multi-sample workflows.

• Compatible with digital sample management systems using barcodes or numeric codes.

These features ensure secure, traceable, and organized storage of biological samples while supporting efficient laboratory workflows. The combination of robust PP construction, leak-proof external threading, and practical identification design enhances reliability during extreme cryogenic storage and handling.