Flat Bottom Flask Two Neck Jointed, BORO 3.3 Glass
From $19.90 (Ex GST)
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Flat Bottom Flask Two Neck Jointed supplied by LabChoice Australia provides secure, precision fitted connectivity for reflux, distillation, inert gas handling, reagent addition and temperature monitoring across teaching, analytical and industrial laboratories. The two neck configuration enables simultaneous attachment of condensers, dropping funnels, thermometers, gas adapters or stoppers, supporting efficient multi step assemblies in organic synthesis, purification and reaction development workflows where controlled addition and accurate monitoring are essential.
Manufactured from premium BORO 3.3 borosilicate glass that complies with ISO 3585 and ASTM E438 Type 1 Class A standards, these flasks deliver outstanding thermal stability, chemical resistance and mechanical strength for sustained heating, solvent reflux and routine laboratory handling. The flat bottom design offers stable bench placement and is well suited to use with hotplates, heating blocks, sand baths and support stands. Uniform wall thickness helps distribute heat evenly and reduces stress points, improving durability during thermal cycling, vacuum use and prolonged reaction runs.
Each flat bottom two neck jointed flask features precisely ground taper joints manufactured in accordance with ISO 383 and ASTM E676 dimensional standards for interchangeable glassware. This ensures reliable compatibility with standard cone joints, joint clips and modular glassware systems used in synthesis and distillation. The accurately formed neck alignment supports secure sealing and efficient vapour path control when assembling condensers, stillheads, Claisen adapters or reaction manifolds. High clarity BORO 3.3 glass allows continuous visual monitoring of boiling behaviour, reflux rate, phase changes and reaction progression, supporting safer operation and improved reproducibility.
Flat bottom two neck jointed flasks are widely used for reflux synthesis, controlled reagent additions, catalytic reactions, moisture sensitive chemistry under inert gas, fractional and simple distillation, solvent evaporation and R and D workflows requiring flexible glassware configurations. The two neck layout improves laboratory productivity by enabling rapid assembly and disassembly of complex setups, while maintaining leak resistant connections for consistent temperature control and efficient solvent handling.
All flat bottom two neck jointed flasks supplied by LabChoice Australia undergo ISO 9001 aligned quality control inspection. This includes joint taper accuracy verification, dimensional conformity checks, wall thickness assessment, annealing and thermal stress control review, visual inspection for inclusions and surface defects, and fit testing to confirm joint interchangeability and secure sealing. Each flask is validated to support compliance with ISO 3585 and ASTM E438 borosilicate glass expectations, along with ISO 383 or ASTM E676 joint standards for long term reliability, leak free system integration and safe performance in precision laboratory work.