Sterile Rubber Stopper D2 20mm

$3.00

Ensure optimal moisture release and reliable sealing with the 20mm Sterile Lyophilization Rubber Stopper (20-D2) from vialshop.com. Specifically engineered for 20mm neck tubular and molded glass injection vials, this pharmaceutical-grade butyl rubber stopper features a classic two-leg (two-vent) configuration. It allows efficient vapor escape during the sublimation stage of freeze-drying before final mechanical sealing. Pre-sterilized and chemically inert, it guarantees low moisture absorption, excellent thermal stability, and a tight, leak-proof barrier for sensitive biologicals, vaccines, and freeze-dried powders.

The 20mm Sterile Lyophilization Rubber Stopper (Model 20-D2) from vialshop.com provides precise, high-performance sealing for pharmaceutical, biotechnology, and laboratory applications requiring freeze-drying. Formulated from premium bromobutyl/chlorobutyl rubber, this stopper offers exceptional chemical inertness, minimal extractables, and superior seal integrity.

Featuring a classic two-legged (two-vent) design, the 20-D2 stopper remains stably seated in the half-stoppered position during lyophilization. This creates a wide opening for water vapor to escape efficiently during sublimation. Once the freeze-drying cycle completes and the stoppering mechanism engages, it forms a hermetic, airtight barrier that shields moisture-sensitive powders and drugs from humidity, oxygen, and atmospheric contamination.

Key Features

Two-Leg Vented Design (20-D2): Engineered with two symmetrical legs to maintain stability in the partially seated position while allowing unrestricted vapor exhaust during freeze-drying.
Pharmaceutical-Grade Butyl Rubber: High-purity bromobutyl/chlorobutyl elastomer ensures minimal drug interaction, low gas/vapor permeability, and zero leachables.
Pre-Sterilized & Cleanroom Processed: Manufactured to conform with strict YBB, EP, and ISO standards for sterile pharmaceutical manufacturing workflows.
Standard 20mm Neck Fit: Fully compatible with standard 20mm finish glass serum bottles, tubular vials, and molded injection vials.
Hermetic Vacuum Integrity: Retains physical elasticity across extreme freezing and heating cycles, guaranteeing a reliable vacuum seal after crimp capping.

Technical Specifications

Feature	Specification
Product Type	Lyophilization Rubber Stopper
Model / Style	20-D2 (Vented / Two-Leg)
Diameter / Size	20mm (Fits standard 13.2mm ID / 20mm OD vial necks)
Material	Pharmaceutical-Grade Bromobutyl / Chlorobutyl Rubber
Color	Grey
Compliance Standards	YBB / EP / ISO Standards
Primary Application	Freeze-dried (lyophilized) pharmaceuticals, vaccines & biologicals
Sterility	Sterile / Cleanroom Grade

Common Applications

Freeze-Dried (Lyophilized) Pharmaceuticals: Secures biological compounds, active pharmaceutical ingredients (APIs), and antibiotic powders.
Vaccines & Biologics Storage: Ideal for temperature- and moisture-sensitive biological products requiring aseptic conditions.
Diagnostic & Reference Standards: Ensures zero vapor transfer or degradation for sensitive diagnostic controls and chemical standards.