5000ML 2-Neck Reaction Flask NANSHIN 5L Borosilicate Glass Easy Clamp

Description

Product Overview

The 5000ML 2-neck reaction flask offered by NANSHIN is engineered for demanding laboratory environments where reliability, durability, and precision are essential. Constructed from G3.3 borosilicate glass, the flask provides superior thermal shock resistance, allowing it to withstand rapid temperature changes without cracking. Its annealing point of 560°C and softening point of 820°C ensure that the glass maintains structural integrity even under prolonged heating, making it suitable for high‑temperature reactions, reflux operations, and distillation processes. The flask features a generous 5 L volume, providing ample space for large‑scale syntheses while maintaining a compact footprint that fits standard laboratory benches and fume hoods. The dual‑neck design includes a 2‑inch neck for the main reaction chamber and a secondary neck for auxiliary connections, enabling simultaneous addition of reagents, temperature probes, or gas inlet tubes. An easy‑clamp mechanism secures the necks firmly, preventing leaks and ensuring a tight seal during vigorous stirring or vacuum applications. The linear coefficient of expansion, measured at 32×10⁻⁷ / °C, guarantees dimensional stability across a wide temperature range, reducing the risk of stress‑induced fractures. Overall, this reaction flask combines robust material properties with thoughtful engineering to meet the rigorous standards of modern chemical research and industrial process development.

Usage

This reaction flask is ideally suited for a variety of laboratory settings, including academic research labs, pharmaceutical development facilities, and industrial process testing environments. Its 5 L capacity accommodates medium‑scale reactions such as polymerizations, catalyst screenings, and multi‑step syntheses that require ample reaction volume while maintaining precise temperature control. The dual‑neck configuration allows users to attach a thermometer or thermocouple to one neck while adding reagents or inserting a condenser on the other, facilitating complex reaction setups without the need for additional adapters. The easy‑clamp system simplifies assembly and disassembly, reducing setup time and minimizing the potential for user error during connection of glassware components. The flask’s high thermal resistance makes it appropriate for reflux operations at temperatures approaching 200°C, as well as for heating under oil baths, sand baths, or direct flame, provided that the temperature does not exceed the glass’s softening point. Additionally, the flask can be employed in vacuum distillation processes, where its sturdy construction prevents implosion under reduced pressure. Its chemical resistance to most acids, bases, and organic solvents ensures compatibility with a broad spectrum of reagents, making it a versatile tool for synthetic chemistry, analytical testing, and material science investigations.

Why Choose Us

Choosing the NANSHIN 5000ML 2‑neck reaction flask means selecting a product that reflects a commitment to quality, safety, and performance. Each flask undergoes rigorous quality control procedures, including visual inspection for glass imperfections, dimensional verification of neck diameters, and pressure testing to confirm the integrity of the clamp mechanism. The use of G3.3 borosilicate glass, a material renowned for its low thermal expansion and high chemical durability, ensures that the flask will endure repeated heating‑cooling cycles without degradation. NANSHIN’s manufacturing process incorporates annealing steps that relieve internal stresses, further enhancing the glass’s resistance to thermal shock. In addition to the physical attributes of the flask, the company provides comprehensive technical support, offering guidance on optimal usage, cleaning protocols, and safety considerations. Customers benefit from a responsive after‑sales service team that can address inquiries about compatibility with ancillary equipment, replacement parts for the clamp system, and troubleshooting of any performance issues. By investing in this flask, laboratories gain a reliable piece of equipment that reduces downtime, improves experimental reproducibility, and upholds the highest standards of laboratory safety.

Key Features

• Durable G3.3 borosilicate glass resists thermal shock and chemical corrosion
• 5 L capacity supports medium‑scale reactions while conserving bench space
• Dual‑neck design enables simultaneous reagent addition and temperature monitoring
• Easy‑clamp mechanism provides a secure, leak‑free seal for vigorous stirring
• Comprehensive technical support and after‑sales service ensure reliable long‑term use

FAQ

What temperature range can the flask safely handle?

The flask is rated for continuous use up to its annealing point of 560 °C and can tolerate short exposures up to the softening point of 820 °C. For most laboratory applications, operating temperatures below 200 °C are well within the safe range.

Can the flask be used with standard laboratory clamps and stands?

Yes, the flask’s neck dimensions conform to standard 2‑inch glassware specifications, allowing it to be secured with common clamps, ring stands, and support brackets. The integrated easy‑clamp feature further simplifies attachment and removal.

Is the glass compatible with strong acids and bases?

The G3.3 borosilicate glass material exhibits excellent resistance to a wide range of chemicals, including concentrated acids such as hydrochloric, sulfuric, and nitric acid, as well as strong bases like sodium hydroxide. Routine cleaning with appropriate solvents is recommended to maintain clarity.

How does the linear coefficient of expansion affect performance?

A low linear coefficient of expansion (32×10⁻⁷ / °C) means the glass expands minimally with temperature changes, preserving dimensional stability and reducing stress that could lead to cracks or leaks during heating or cooling cycles.

What warranty or guarantee does NANSHIN provide?

NANSHIN offers a limited warranty covering manufacturing defects for a period of one year from the date of purchase. The warranty does not cover damage caused by misuse, improper handling, or exposure to conditions beyond the specified temperature limits.