Borosilicate Glass Burette 50ml

Product Code : SCL-LG-12006

The Borosilicate Glass Burette 50ml from Science Lab Supplies delivers exceptional fluid modulation and reliability for strict quantitative laboratory procedures. Fabricated from premium-grade Borosilicate 3.3 glass, the barrel features an expansion-resistant, heavy-walled structure that withstands aggressive acids, strong bases, and organic solvents. The uniform cylindrical bore ensures stable, linear fluid descent, while the permanent high-contrast graduation marks remain perfectly legible under bright workspace lighting conditions.

This high-performance laboratory burette features a high-grade, straight-bore PTFE stopcock plug that requires no lubrication, preventing sample contamination from external industrial greases. Designed to survive rigorous, repeated everyday workflows, it serves as an indispensable asset in our catalog of laboratory glassware, providing commercial testing facilities and universities with a trustworthy tool for achieving highly reproducible analytical titrations.

Key Features

• Premium Glass Formulation: Crafted from expansion-resistant Borosilicate 3.3 glass to guarantee optimal chemical durability against volatile reagents.
• Class A Volumetric Accuracy: Engineered to meet strict Class A tolerance limits, minimizing experimental error margins during critical titrations.
• Grease-Free PTFE Stopcock: Equipped with a straight-bore PTFE plug that turns smoothly without vacuum grease, eliminating fluid purity issues.
• Permanent Calibrations: Features high-visibility, crisp enamel graduation markings fused onto the glass body to resist fading from intensive wash cycles.
• Precision-Ground Delivery Tip: Specially optimized tip geometry ensures uniform droplet size and prevents fluid hanging or trailing at the discharge point.
• Autoclavable Barrel Design: The heavy-duty glass barrel safely tolerates intense thermal sterilization up to 140°C when detached from its plastic fittings.

Technical Specifications

What's Included in the Kit

• 2 x Borosilicate Glass Burette Barrel 50ml
• 2 x Interchangeable PTFE Straight-Bore Stopcock Plugs
• 1 x Calibrated Volumetric Certificate and Operation Guide

Applications / Uses

• Performing complex acid-base neutralizations and precise redox titrations in analytical research environments.
• Standardizing custom volumetric chemical solutions inside commercial quality control testing labs.
• Serving as a reliable reference standard component within premium volumetric instruments groupings.
• Equipping educational setups with rugged, reusable hardware found in our custom university science kits.
• Measuring out micro-volumes of corrosive solvents during specialized organic synthesis research workflows.

How to Use the Borosilicate Glass Burette 50ml

1. Clamp the burette tube vertically into a standard burette stand, making sure it is completely perpendicular to the benchtop.
2. Ensure the PTFE straight stopcock is closed completely by aligning the plug handle perpendicular to the glass barrel.
3. Fill the glass tube with your titrant solution using a small glass funnel until it rises slightly above the zero mark.
4. Place a waste container beneath the tip and open the stopcock briefly to clear any air bubbles trapped in the lower nozzle, lowering the meniscus level exactly to the 0.00 mL line at eye level.
5. Rotate the plug handle gently to dispense the liquid drop-by-drop into your titration flask while swirling the mixture continuously.

Handling Note: Never try to force the stopcock handle if it encounters physical resistance. Ensure the locking nut is properly adjusted to avoid fluid leakage or structural glass strain.

Care & Maintenance

• Prompt Rinsing: Flush out all chemical reagents with distilled water immediately after every titration to prevent mineral deposition inside the narrow bore.
• Stopcock Disassembly: Remove the PTFE plug during long-term storage periods to prevent the polymer from deforming within the glass shell shell over time.
• Secure Vertical Storage: Dry the washed burettes completely and store them vertically or inverted in a dedicated dust-free cabinet using protective foam inserts.

Why Choose Science Lab Supplies

Science Lab Supplies is an internationally acclaimed manufacturer and dependable exporter of high-accuracy scientific equipment, didactic models, and educational setups. Drawing from decades of engineering experience, we construct top-tier laboratory instruments that comply with stringent global quality and calibration frameworks. Our vast distribution capabilities enable timely, secure worldwide supply to institutional labs, testing clinics, and educational entities alike. Furthermore, we maintain a robust assortment of high-grade laboratory plasticware solutions to fully complement your workspace workflow.

Frequently Asked Questions

What is a Borosilicate Glass Burette 50ml used for?

A Borosilicate Glass Burette 50ml is used to measure and dispense exact volumes of liquid reagents during chemical analytical procedures. It features a controlled stopcock valve to deliver titrants drop-by-drop for identifying exact reaction endpoints.

What are the benefits of a PTFE stopcock over a glass stopcock?

A PTFE stopcock operates entirely grease-free, eliminating the risk of hydrocarbon grease leaching into pure chemical samples. Additionally, PTFE resists chemical freezing, preventing the stopcock plug from locking permanently into the glass barrel.

Can this glass burette be autoclaved safely?

Yes, the Borosilicate 3.3 glass barrel can be safely sterilized in an autoclave up to 140°C. However, the PTFE plug assembly should be removed prior to the thermal cycle to avoid mismatching expansion stresses.

What does Class A tolerance mean for a 50ml burette?

Class A tolerance means the instrument is manufactured to the highest international accuracy tier, guaranteeing a strict margin of error of less than +/-0.05 mL for optimal reporting precision.

Can it be used for strong alkaline or basic solutions?

While it can be used for basic solutions during standard titration windows, strong alkalis should not be stored inside the borosilicate glass barrel long-term, as bases can slowly etch glass over extended periods.

Explore our comprehensive collection of premium fluid measurement systems by visiting our specialized laboratory glassware category page today to secure peak precision for your facility.