Description
Dropping funnel 250 ml NS 19/26 is a cylindrical graduated laboratory funnel intended for controlled dropwise delivery of reagents in synthetic and preparative chemistry. It offers a nominal capacity of 250 ml with graduation intervals of 5 ml, allowing continuous volume tracking during addition. The assembly includes cone and socket joints of NS 19/26 and a stopcock bore of 4 mm for efficient flow. A valve stopcock fitted with a PTFE valve spindle and threaded stopcock lock provides secure sealing and guards against accidental opening. Designed without pressure equalisation, the funnel supports straightforward gravity-fed operation under ambient laboratory conditions. This glassware component from manufacturer Witeg is well suited to organic reactions, extractions and routine dosing tasks that demand reliable volumetric control. Delivered in packs of 2 pieces with a net weight of 0,176 kg, the cylindrical body ensures easy scale readability while the PTFE elements deliver chemical resistance to common solvents and reagents. It serves research and quality-control environments that require standardised ground-joint connections for consistent liquid transfer.
This article is part of Dropping funnels, in Funnels.
Key features
- Pack size: 2 pc(s)
- Capacity: 250 ml
- Graduation interval: 5 ml
- Joint size: NS 19/26
- Bore diameter: 4 mm
- Stopcock type: PTFE valve spindle with threaded lock
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Questions about Dropping funnels 250ml ST 19/26
What is this article?
Dropping funnels 250ml ST 19/26 is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Dropping funnels, inside Funnels, in Labware.
A dropping funnel adds a liquid slowly into a closed reaction through a stopcock and usually a ground joint. A pressure-equalising arm keeps the funnel from air-locking. The joint size and the volume are the specification.
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 Dropping funnels. The catalogue is Labware.
Shelves beside this one are Funnels (plastic, glass & steel), Büchner & filter funnels, Separating 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.