Description
Dropping funnel 250 ml with socket NS 29/32 and cone NS 29/32 is a cylindrical graduated laboratory dropping funnel equipped with a pressure equalisation tube. The outlet tube terminates in a drip tip and is controlled by a solid glass stopcock NS 14,5 with a 4 mm bore. Constructed from borosilicate glass 3.3, the funnel combines chemical inertness with good thermal shock resistance for everyday laboratory service. Clear graduations allow reliable volume monitoring while liquids are added drop-wise or in a continuous stream. Offered by manufacturer Rettberg, the unit is suited to preparative organic chemistry, extraction procedures and any workflow that demands accurate dosing through standard ground-joint glassware. The pressure-equalisation tube prevents vapour lock and ensures steady delivery even when the receiving flask is under vacuum or slight over-pressure. Nominal volume is 0,25 l and net weight is 0,400 kg; each funnel is supplied as one piece ready for direct connection to NS 29/32 apparatus.
This article is part of Dropping funnels, in Funnels.
Key features
- Pack size: 1 pc
- Product type: Dropping funnel
- Nominal volume: 0,25 l
- Material: Borosilicate glass 3.3
- Socket / cone: NS 29/32
- Stopcock bore: 4 mm
- Technical Information Sheet:
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Questions about Dropping funnel, 250 ml, graduated, joints size 29/32, stopcock 4 mm,
What is this article?
Dropping funnel, 250 ml, graduated, joints size 29/32, stopcock 4 mm, is the article on this page. Luminix Health distributes Rettberg 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.