Description
4-Neck flask, 4000 ml, centre neck NS 45/40, 3x side necks NS 29/32 angled is a multi-neck laboratory flask intended for complex reaction, distillation and multi-port setups. Fabricated from borosilicate glass 3.3, the vessel combines chemical resistance with thermal stability for repeated heating and cooling cycles. The central ground joint is NS 45/40 while the three side necks are NS 29/32 and angled at 7° to improve access for stirrers, condensers, dropping funnels or temperature probes. With a nominal volume of 4 l and a net weight of 1,050 kg, the flask is supplied as one piece from manufacturer Rettberg. The four-neck geometry supports simultaneous operations such as reagent addition, gas inlet, mechanical stirring and monitoring, making it suitable as a round-bottom flask, distillation flask or receiving flask in organic synthesis and preparative chemistry. Precision ground joints ensure reliable, leak-tight connections with standard laboratory glassware, enhancing safety and workflow efficiency in research and production environments.
This article is part of Round-bottom flasks, in Beakers & flasks. See also Flat-bottom flasks.
Key features
- Pack size: 1 pc
- Nominal volume: 4 l
- Material: Borosilicate glass 3.3
- Number of necks: 4
- Centre neck: NS 45/40
- Side necks: 3 × NS 29/32 angled (7°)
- Technical Information Sheet:
Recently viewed
You may also like
Browse related categories
Category
Sub-category
Catalogue
Brand
Questions about 4-neck flask, 4000 ml, mn size 45/40, 3x sn size 29/32 (7°)
What is this article?
4-neck flask, 4000 ml, mn size 45/40, 3x sn size 29/32 (7°) is the article on this page. Luminix Health distributes Rettberg 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.
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.