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GRADUATED BOROSILICATE GLASS TEST TUBE WITH STOPPER (18 × 150 MM, 25 ML)
Quick Overview (AI Search Summary)
The Apex Labs 25mL Graduated Borosilicate Glass Test Tube (18 × 150mm) with Stopper is a high-precision volumetric container crafted from low-expansion 3.3 borosilicate glass. Featuring permanent enamel graduations and an interchangeable ground-glass stopper, it provides superior thermal shock resistance, chemical inertness, and a leak-proof seal for volatile sample mixing, incubation, and storage. Fully autoclavable with GST tax invoices and GeM portal fulfillment.
Note: Images for illustration purposes only. Actual color, design, or packaging may vary based on manufacturing batches.
The Apex Labs 25mL Graduated Borosilicate Glass Test Tube (18 × 150mm) with Stopper is a high-precision volumetric laboratory container designed for accurate liquid sample measurement, chemical reagent mixing, incubation, and volatile solution storage. Manufactured from premium, low-expansion 3.3 borosilicate glass, this test tube offers exceptional thermal shock resistance, high mechanical durability, and complete chemical inertness against aggressive acids, alkalis, and organic solvents.
Equipped with a ground-glass interchangeable stopper for a tight, leak-proof closure, it effectively prevents sample evaporation and airborne contamination during reactions or long-term storage. Featuring permanent enamel volume graduations for rapid visual readings, this autoclavable 25mL tube is essential for clinical assays, pharmaceutical QC, university research, and analytical testing workflows.
Explore our broader laboratory glassware catalog for additional volumetric tubes, culture tubes, boiling flasks, and customized borosilicate solutions.
B2B Bulk Procurement & GeM Portals: Apex Labs manufactures precision volumetric and general laboratory glassware including Graduated Borosilicate Glass Test Tubes (25mL) backed by GST-compliant commercial invoices to facilitate Input Tax Credit (ITC) claiming.
For central universities, IITs, state diagnostic centers, public sector undertakings, and government research laboratories, we support direct contracting, rate contracts, and tender fulfillment through our active vendor profile on the Government e-Marketplace (GeM) portal.
Product Specification & Direct Ordering
Graduated Test Tube 18x150mm with Stopper (25mL): Heavy-duty 3.3 borosilicate glass tube featuring permanent white enamel graduations, uniform wall thickness, and an interchangeable ground-glass stopper.
Technical Specifications: Graduated Glass Test Tube
| Specification Parameter | Technical Detail |
|---|---|
| Dimensions (OD × Length) | 18 mm Outer Diameter × 150 mm Length |
| Volumetric Capacity | 25 mL |
| Material Construction | Premium Borosilicate Glass 3.3 (Low Expansion, Thermal & Chemical Resistant) |
| Closure System | Interchangeable Ground-Glass Stopper / Polypropylene Stopper |
| Graduations & Markings | Permanent White/Amber Enamel Volume Markings |
| Sterilization Tolerance | Autoclave Safe up to 121°C (15 psi) |
| Base Geometry | Round Bottom (Flat Bottom available upon request) |
| Brand & Country of Origin | Apex Labs (100% Manufactured in India – Varanasi, UP) |
Custom Sizes & Bulk Institutional Supply
Require alternative dimensions (12x100mm, 15x125mm, 25x150mm, 25x200mm), amber-stained borosilicate glass for light-sensitive reagents, or custom volumetric calibration marks? Apex Labs provides custom glassware fabrication for pharmaceutical manufacturers, diagnostic labs, and research institutions. Contact us for bulk carton pricing and technical spec sheets.
Technical Material & Performance Highlights
- Borosilicate 3.3 Thermal Shock Resistance: Engineered to withstand high operational temperatures and sudden temperature changes during heating or boiling.
- Precision Ground Joint Seal: Matches standard ground taper specifications to provide an airtight, leak-resistant seal for volatile organic compounds.
- High Mechanical Strength: Uniform wall thickness eliminates thermal stress concentration points, extending service life in busy laboratories.
- Chemical Inertness: Resistant to acidic, basic, and solvent attack, preventing glass ion leaching into high-purity biological or analytical samples.
Primary Sector Applications
- Volumetric Sampling & Dilutions: Precise volumetric mixing, measuring, and serial dilutions of liquid reagents.
- Sample Incubation & Storage: Secure closure prevents evaporation during heating, water bath incubation, or sample storage.
- Analytical & Clinical Testing: Routine qualitative and quantitative chemical analysis in pharmaceutical, environmental, and testing labs.
- Educational Practicals: High-durability volumetric glassware for university, college, and school chemistry practicals.
Graduated Borosilicate Glass Test Tube FAQ
Q: Are the enamel volume graduations resistant to laboratory washing and chemicals?
A: Yes, the graduations are fired with durable white enamel that resists fading, chemical erosion, and repeated autoclaving cycles.
Q: Can institutional clients purchase this test tube with GST invoicing via GeM?
A: Yes, Apex Labs provides full GST tax invoices for Input Tax Credit (ITC) claiming and fulfills institutional tender/direct orders via the Government e-Marketplace (GeM) portal.
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