Description
Pear-shaped separating funnel, 25 ml, ungraduated, with PTFE key NS 12,5/2,5 mm bore is a compact laboratory glassware item for liquid–liquid extractions and clean phase separations. The body is manufactured from borosilicate glass 3.3, chosen for chemical resistance and thermal durability in routine laboratory use. It is fitted with a PE stopper on ground joint NS 14,5/23 and presents an ungraduated pear-shaped vessel with a nominal volume of 25 ml (0,025 l). The PTFE stopcock key with NS 12,5/2,5 mm bore allows controlled release of the lower phase after settling. This separating funnel from manufacturer Rettberg is supplied as a single piece and suits analytical and preparative chemistry where reliable separation of immiscible liquids is required. The pear geometry promotes thorough drainage of the denser phase, while the PTFE key helps reduce seizing compared with glass keys. Net weight is approximately 0,077 kg, making the unit convenient for bench-scale work. Typical applications include organic synthesis work-ups, solvent extractions, sample clean-up and general wet-chemistry procedures in research, teaching and quality-control laboratories that need robust small-volume separating funnels.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Product type: Separating funnel
- Shape: Pear-shaped
- Nominal volume: 25 ml (0,025 l)
- Material: Borosilicate glass 3.3
- Stopcock: PTFE key NS 12,5/2,5 mm bore
- Technical Information Sheet:
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Questions about Separatory funnel, conical shape, 25 ml, PTFE-stopcock size 12,5/ 2,5 mm bore,
What is this article?
Separatory funnel, conical shape, 25 ml, PTFE-stopcock size 12,5/ 2,5 mm bore, is the article on this page. Luminix Health distributes Rettberg for laboratory use. It sits in Ballons à fond rond, inside Béchers & fioles, in Matériel de laboratoire.
A round-bottom flask is the heating flask of a distillation or a reflux. The curved wall takes the heat, and the ground neck connects to a still head or a condenser. The joint size, not only the volume, has to match the rest of the set.
A beaker is an open working vessel: easy to pour, poor as a measure. An Erlenmeyer flask has a flat base and a conical wall so a liquid can be swirled without climbing out. A round-bottom flask is for heating under a condenser, because the heat meets a curved wall and the joint at the neck connects to the rest of the glassware. Borosilicate is the glass that survives the temperature change. These forms are listed under ISO laboratory glassware.
Which category should I open next?
The category is Béchers & fioles. The sub-category is Ballons à fond rond. The catalogue is Matériel de laboratoire.
Shelves beside this one are Béchers, Fioles Erlenmeyer, Récipients de réaction & récipients à double enveloppe, Fioles à fond plat, Fioles (autres) and Accessoires pour béchers & fioles.
What should I check before I order?
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.