Description
Cylindrical separating funnel 250 ml NS 29/32 is a graduated laboratory glassware item engineered for efficient liquid-liquid extractions and phase separations in chemical and biochemical workflows. Constructed from durable borosilicate glass 3.3, it delivers high chemical resistance together with good thermal stability for everyday laboratory use. The cylindrical body carries clear graduation marks that assist volume monitoring during transfers and separations. Equipped with a solid NS stopcock plug featuring a 2,5 mm bore, the funnel permits precise control when draining the denser phase. An NS polyethylene stopper completes the assembly and seals the top at the standardised NS 29/32 ground joint. This practical design from manufacturer Witeg is supplied in packs of two pieces and integrates readily with other NS-compatible glassware. The combination of robust glass, reliable stopcock and PE stopper supports repeated cleaning and handling cycles in teaching, research and quality-control settings. Cylindrical geometry aids visual observation of phase interfaces, while the 250 ml capacity suits medium-scale preparative work. Suitable for organic solvent partitioning, sample clean-up and analytical extractions, the funnel offers a dependable solution for routine separation tasks without unnecessary complexity.
This article is part of Separating funnels, in Funnels.
Key features
- Pack size: 2 pc(s)
- Capacity: 250 ml
- Material: Borosilicate glass 3.3
- Shape: Cylindrical, graduated
- Joint size: NS 29/32
- Stopcock bore: 2,5 mm
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Questions about Separatory funnel Cylinder 250ml ST 29/32
What is this article?
Separatory funnel Cylinder 250ml ST 29/32 is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Separating funnels, inside Funnels, in Labware.
A separating funnel lets two immiscible liquids settle into layers and then runs off the lower one through a stopcock. The shape, Squibb or pear, changes how sharp the interface is as the last millilitres leave. The stopper and the stopcock are both needed.
A funnel guides a liquid or a powder into a narrower mouth. A filter funnel holds a paper. A Büchner funnel is the flat perforated plate used with vacuum. A separating funnel has a stopcock so two liquid layers can be run off one at a time. A dropping funnel adds a reagent slowly into a reaction. The bore and the stopcock are the parts that matter. This glassware is listed under ISO laboratory glassware.
Which category should I open next?
The category is Funnels. The sub-category is Separating funnels. The catalogue is Labware.
Shelves beside this one are Funnels (plastic, glass & steel), Büchner & filter funnels, Dropping funnels and Powder funnels.
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.
How does ordering and shipping work?
Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.