Key Features

• Round bottom design for uniform heat distribution and efficient mixing.
• High-transparency borosilicate glass for clear visibility of media, cultures, and sedimentation.
• Excellent thermal and chemical resistance suitable for autoclaving, heating, and sterilization cycles.
• Precision-formed edges for compatibility with cotton plugs, screw caps, and rubber stoppers.
• Non-porous, smooth inner surface minimizes contamination retention and ensures easy cleaning.
• High durability, withstands repeated use in demanding laboratory workflows.
• Leak-resistant construction enables secure storage and transport of cultures and samples.
• Available in multiple sizes to support diverse experimental requirements.

Material Specifications

• Material: Borosilicate Glass 3.3

Thermal Properties:

• High thermal shock resistance
• Low thermal expansion coefficient (~3.3 × 10⁻⁶ /K)
• Suitable for direct flame heating (within recommended limits)

Chemical Resistance:

• Inert to most acids, alkalis, solvents, and biological media
• Non-reactive surface ensures accurate results

Mechanical Properties:

• Strong structural integrity
• Crack- and scratch-resistant under routine handling

Standards Compliance:

• Manufactured in accordance with ISO 3585 (Borosilicate Glass 3.3 Quality Standard)

Technical Specifications

Available Sizes / Capacities:
Common volumes: 5 ml to 60 ml (as per the standard size table)

Dimensions:
Tubes available in multiple lengths and diameters (e.g., Ø 12 mm, 16 mm, 18 mm, 20 mm, etc.)

Tolerance:
Each tube is manufactured with consistent dimensional accuracy suitable for standard plug and cap sizes.

Finish Options:

• Plain rim
• Screw-thread neck
• With or without marking spot

Calibration:
Not applicable (non-graduated tubes).

Packaging:

• Clean, bulk or shrink-wrapped pack
• Tamper-proof export-grade cartons
• Break-resistant and cushioning protective layers

Handling & Precautions

Safe Use:
Handle with care, avoiding sudden drops or impacts.

Cleaning:
Wash with mild laboratory detergents; avoid abrasive scrubbers.

Autoclaving:
Safe for autoclaving at 121°C for 15–20 minutes; ensure caps/plugs are loosened.

Heating:
Suitable for heating over spirit burners or heating blocks; avoid rapid temperature changes.

Do’s:

• Inspect for cracks before use
• Use appropriate racks or holders
• Allow gradual cooling after sterilization.

Don’ts:

• Do not subject tubes to open flame heating without gradual warming
• Do not freeze liquid-filled tubes
• Do not overtighten screw caps during sterilization.

Best Practices:
Maintain proper drying after wash cycles and store upright to prevent contamination.

Applications

• Microbiology: Media preparation, inoculation, culturing, and incubation.
• Pharma & Biotechnology: Sample storage, organism culturing, suspension preparation.
• QC/QA Laboratories: Routine quality analysis, microbial load testing, and sedimentation tests.
• Academic & Research Labs: Teaching experiments, biochemical studies, and research culture work.
• Chemical & Environmental Labs: Sample collection, centrifugation compatibility (size-dependent).
  These tubes play an essential role in maintaining sterile, reliable, and contamination-free workflows.

Why Choose MEDILAB

• 35+ years of expertise in scientific glassware manufacturing.
• Exports to 40+ countries with a strong global presence.
• Export-quality production using high-precision forming and strict quality inspection systems.
• OEM & Private Labeling options are available for distributors and brands.
• Consistent quality, reliability, and durability trusted by laboratories worldwide.
• Robust packaging and a dependable supply chain ensure safe delivery and uninterrupted availability.