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
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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.
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Pharmaceutical-Grade Butyl Rubber: High-purity bromobutyl/chlorobutyl elastomer ensures minimal drug interaction, low gas/vapor permeability, and zero leachables.
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Pre-Sterilized & Cleanroom Processed: Manufactured to conform with strict YBB, EP, and ISO standards for sterile pharmaceutical manufacturing workflows.
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Standard 20mm Neck Fit: Fully compatible with standard 20mm finish glass serum bottles, tubular vials, and molded injection vials.
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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
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Freeze-Dried (Lyophilized) Pharmaceuticals: Secures biological compounds, active pharmaceutical ingredients (APIs), and antibiotic powders.
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Vaccines & Biologics Storage: Ideal for temperature- and moisture-sensitive biological products requiring aseptic conditions.
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Diagnostic & Reference Standards: Ensures zero vapor transfer or degradation for sensitive diagnostic controls and chemical standards.
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