Description
Sulfonation flask 4000 ml NS 71/51 with four side necks NS 29/32 is a large multi-neck laboratory flask for chemical reactions requiring multiple simultaneous connections. It has a nominal volume of 4000 ml and a total volume of 4500 ml, fitted with a wide central main ground joint NS 71/51 and four lateral ground joints of size NS 29/32. The spacious main neck accepts larger condensers, stirrer drives or bulk fittings, while the four side necks enable concurrent use of dropping funnels, gas inlets, temperature sensors or additional reagent lines. Standardised joints ensure compatibility with common laboratory glassware. Supplied as one piece from manufacturer Witeg, the flask weighs 1,69 kg net and is intended for preparative organic synthesis, scale-up work and multi-port reaction setups in research and industrial laboratories. The combination of high capacity, a large main joint and four side ports provides flexible access to the reaction mixture. This design is particularly practical for sulfonation and other multi-reagent procedures that need reliable ground-joint connections and ample working volume.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Nominal volume: 4000 ml
- Total volume: 4500 ml
- Main neck: NS 71/51
- Side necks: 4 × NS 29/32
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Questions about sulfonation flask 4500ml NS71/51 4x29/32
What is this article?
sulfonation flask 4500ml NS71/51 4x29/32 is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Round-bottom flasks, inside Beakers & flasks, in Labware.
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 Beakers & flasks. The sub-category is Round-bottom flasks. The catalogue is Labware.
Shelves beside this one are Beakers, Erlenmeyer flasks, Reaction vessels & jacketed vessels, Flat-bottom flasks, Flasks (other) and Beaker & flask accessories.
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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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.

