Cylindrical Dropping Funnel with PTFE Stopcock, Open Top, BORO 3.3 Glass

Cylindrical Dropping Funnel with PTFE Stopcock, Open Top, BORO 3.3 Glass is designed for controlled addition of liquids, reagents, solvents, and reaction mixtures into compatible laboratory glassware setups. Its cylindrical body provides a clear liquid reservoir, while the PTFE stopcock allows smooth and accurate flow control during chemistry, synthesis, teaching, and routine laboratory procedures.
Manufactured from BORO 3.3 borosilicate glass, this dropping funnel provides reliable chemical resistance, thermal stability, and clear visibility during laboratory use. BORO 3.3 glass is widely used for scientific glassware because it performs well with many common laboratory chemicals and supports dependable use in controlled reagent addition and liquid transfer workflows.
The open top design allows convenient filling from above, making the funnel practical for general reagent addition, solvent charging, and controlled liquid dispensing where a sealed or stoppered top is not required. Because the funnel is open at the top, users should confirm whether their application needs a stoppered, sealed, or pressure-equalising dropping funnel instead.
The PTFE stopcock supports smooth operation and good chemical compatibility with many commonly used laboratory reagents. Compared with a standard glass stopcock, PTFE can provide easier turning, reduced sticking, and reliable flow adjustment when used correctly. This makes the funnel suitable for applications where controlled dropwise addition or gradual liquid transfer is required.
This cylindrical dropping funnel is suitable for school chemistry laboratories, university teaching laboratories, research facilities, synthesis work, quality control laboratories, and general laboratory glassware assemblies. It can be used with compatible stands, clamps, adapters, flasks, and reaction vessels according to the required setup. Proper clamping and support are recommended whenever the funnel is filled or connected to other glassware.
For quality reference, BORO 3.3 laboratory glass is commonly associated with recognised standards such as ISO 3585 and ASTM E438, where supported by manufacturer documentation. ISO 3585 relates to borosilicate glass 3.3 properties, while ASTM E438 is commonly referenced for glass used in laboratory apparatus. If the funnel includes a ground joint connection, joint quality may also be referenced against ISO 383 and ASTM E676 where applicable to the supplied joint specification.
LabChoice Australia supplies this Cylindrical Dropping Funnel with PTFE Stopcock, Open Top, BORO 3.3 Glass for Australian schools, universities, research laboratories, and quality control environments requiring dependable glassware for controlled reagent addition. Its open-top design, cylindrical body, PTFE stopcock, and BORO 3.3 construction make it a practical choice for routine chemistry and laboratory liquid transfer workflows.