Description
Dropping funnel 250 ml with socket NS 29/32 and cone NS 29/32 is a graduated cylindrical laboratory funnel designed for controlled addition of reagents in chemical synthesis and preparative work. Fabricated from borosilicate glass 3.3, it features a solid glass stopcock NS 14,5 with a 4 mm bore, a drain tube with cone NS 29/32 and a drip tip for accurate delivery. Graduation markings allow convenient volumetric monitoring of the 250 ml nominal volume, and the standardised ground joints provide secure coupling to flasks and receivers. This dropping funnel from manufacturer Rettberg suits organic chemistry, extraction procedures and routine laboratory dosing where steady liquid introduction is essential. The borosilicate glass 3.3 body delivers the chemical and thermal durability required for everyday laboratory service. Offered as a single piece, the funnel combines clear graduations with dependable stopcock control, supporting reproducible results in research, development and quality-control settings that rely on precise liquid handling.
This article is part of Dropping funnels, in Funnels.
Key features
- Pack size: 1 pc
- Product type: Dropping funnel
- Nominal volume: 250 ml
- Material: Borosilicate glass 3.3
- Joints: Socket NS 29/32, cone NS 29/32
- Stopcock: Solid glass NS 14,5, bore 4 mm
- Technical Information Sheet:
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Questions about Dropping funnel, 250 ml, graduated, cone/socket size 29/32,
What is this article?
Dropping funnel, 250 ml, graduated, cone/socket size 29/32, is the article on this page. Luminix Health distributes Rettberg for laboratory use. It sits in Entonnoirs à addition, inside Entonnoirs, in Matériel de laboratoire.
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 Entonnoirs. The sub-category is Entonnoirs à addition. The catalogue is Matériel de laboratoire.
Shelves beside this one are Entonnoirs (plastique, verre & acier), Entonnoirs Büchner & filtrants, Ampoules à décanter and Entonnoirs à poudre.
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.