The MEDILAB Solid Glass Stopper is a precision-engineered sealing component designed for use with standardised jointed laboratory glassware. Made from premium Borosilicate Glass 3.3, it provides a secure, airtight closure for reagent bottles, flasks, cylinders, and chemical storage containers. Its durable, solid construction ensures enhanced mechanical strength and long-term reliability in both routine and demanding laboratory environments.

 Key Features

• Manufactured from high-quality Borosilicate Glass 3.3 for exceptional clarity and durability
• Solid structure provides maximum mechanical strength and long service life
• Flat head design ensures easy grip, smooth handling, and safe insertion/removal
• Precision-ground joints provide airtight, leak-free sealing
• Resistant to thermal shock, chemical corrosion, and aggressive laboratory reagents
• Fully compatible with standardised jointed laboratory vessels
• Non-reactive surface maintains sample purity and prevents contamination
• Ideal for long-term storage of sensitive chemicals and solutions

Material Specifications

• Material: Borosilicate Glass 3.3

Thermal Properties:

• Low thermal expansion (3.3 × 10⁻⁶ /°C)
• Excellent resistance to rapid temperature fluctuations
• Suitable for autoclaving and controlled heating

Chemical Properties:

• Highly resistant to acids, alkalis, organic solvents, and corrosive vapours
• Non-porous and stain-resistant

Mechanical Properties:

• Strong, solid construction for demanding applications
• Ground joint ensures precision fit

Standards Compliance:

• Manufactured according to ISO/DIN standards for interchangeable laboratory glassware
• Meets ISO 3585 specifications for Borosilicate Glass 3.3

Technical Specifications

• Available Joint Sizes: 10/19 to 34/35 (as per the standard size table)

• Design: Solid body, flat head, precision-ground joint

Tolerance:

• Standardised joint tolerances for seamless interchangeability
• Not applicable for volumetric calibration

Packaging:

• Individually wrapped to prevent scratches and abrasions
• Packed in shock-resistant, export-grade cartons

Accessories Included:

• Supplied as a stopper only (no additional components required)

 Handling & Precautions

• Insert and remove gently to protect the joint and avoid unnecessary stress
• Clean using mild laboratory detergents; avoid abrasive tools
• Rinse thoroughly after contact with strong reagents
• Autoclavable; allow gradual heating and cooling to prevent thermal stress
• Inspect regularly for chips, cracks, or wear; replace if damaged
• Do not use if the ground joint surface shows visible abrasion

 Applications

• Suitable for reagent bottles, storage flasks, volumetric flasks, and jointed cylinders
• Widely used in analytical, research, academic, and industrial laboratories
• Ideal for pharmaceutical, chemical, biotechnology, environmental, and QC/QA labs
• Ensures safe storage and handling of chemicals, reagents, standards, and sensitive solutions
• Supports daily workflows in sample preparation, chemical storage, and analytical processes

Why Choose MEDILAB

• Over 35 years of specialised expertise in scientific glassware manufacturing
• Trusted by laboratories and distributors in 40+ countries
• Precision manufacturing using export-quality Borosilicate Glass 3.3
• OEM and private labelling are available for global partners
• Consistent quality, dimensional accuracy, and reliability across batches
• Robust packaging ensuring safe worldwide transport
• Strong reputation for durability, performance, and customer satisfaction