Buchner Funnel, Sintered Long Stem with Ground Joint, BORO 3.3 Glass

Buchner Funnel, Sintered Long Stem with Ground Joint, BORO 3.3 Glass is designed for vacuum filtration, solid-liquid separation, precipitate collection, sample washing, and routine laboratory filtration workflows. The integrated sintered glass disc provides a fixed porous filtration surface, allowing liquid to pass through while retaining solid material, without the need for separate filter paper in suitable applications.
Manufactured from BORO 3.3 borosilicate glass, this Buchner funnel offers 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 chemistry, education, research, analytical testing, and quality control environments when handled correctly.
The long stem design helps guide the filtrate further into the receiving vessel or filtration assembly, supporting cleaner liquid transfer and reducing splash risk inside compatible setups. This makes the funnel useful where a deeper connection or more directed filtrate flow is preferred. The long stem also provides practical handling benefits when the funnel is used with compatible jointed flasks, adapters, or vacuum filtration systems.
The ground joint allows the funnel to connect securely with matching ground glass receivers or adapters. A correctly matched joint helps improve assembly stability, supports a cleaner filtration path, and reduces leakage risk compared with loose-fitting connections. Users should always confirm the exact joint size, receiving flask compatibility, vacuum suitability, and proper clamping before operation.
The sintered disc is suitable for filtering precipitates, collecting crystals, washing solids, clarifying solutions, and preparing samples for further laboratory analysis. The required porosity grade should be selected according to the sample type, particle size, solvent system, and preferred filtration speed. Common sintered glass porosity options may include G1, G2, G3, G4, or G5, depending on manufacturer availability and application requirements.
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. Ground glass joint quality may also be referenced against ISO 383 and ASTM E676 where applicable to the supplied joint specification. For regulated or method-controlled laboratory work, users should confirm whether porosity certificates, batch documentation, or compliance records are required before purchase.
LabChoice Australia supplies this Buchner Funnel, Sintered Long Stem with Ground Joint, BORO 3.3 Glass for Australian schools, universities, research facilities, industrial laboratories, and quality control environments requiring reliable filtration glassware. Its BORO 3.3 construction, integrated sintered disc, long stem design, and ground joint connection make it a practical choice for controlled vacuum filtration and laboratory sample preparation.