DURAN® Round Bottom Flask

with standard ground joint

Complies with DIN ISO 4797
Manufactured from 3.3 expansion borosilicate glass
Tight closure due to standard interchangeable ground neck joint
The geometry permits very uniform heating
Closable with glass and plastic stopper
Fired-on, highly durable white print

Product Overview

Due to their versatile application possibilities, round bottom flasks are widely used in the laboratory environment. Round flasks and the media they contain can be heated e.g. by heating mantles or liquid baths or cooled by a cold bath. However, selective warming or cooling must be avoided. Due to their shape, round bottom flasks are also suitable for vacuum applications. However, care must be taken to ensure that the glass surface is free of defects (no cracks, deep scratches, etc.). The standard ground joint allows a precise connection to other ground joint components such as columns, condensers, adapters, funnels, etc.

NS 14/23

Catalog No	Main Article Description	Capacity (mL)	Diameter d (mm)	Height h (mm)
241701307	NS 14/23	25	41	85
241702003	NS 14/23	50	51	90
241702509	NS 14/23	100	64	105

NS 19/26

Catalog No	Main Article Description	Capacity (mL)	Diameter d (mm)	Height h (mm)	Remarks
241701401	NS 19/26	25	41	85	Non-DIN/ISO size.
241701701	NS 19/26	50	51	90	–
241702406	NS 19/26	100	64	105	–

NS 24/29

Catalog No	Main Article Description	Capacity (mL)	Diameter d (mm)	Height h (mm)	Remarks
241701804	NS 24/29	50	51	105	Non-DIN/ISO size.
241702603	NS 24/29	100	64	105	–
241703608	NS 24/29	250	85	140	–
241704407	NS 24/29	500	105	163	–
241705403	NS 24/29	1000	131	200	–

NS 29/32

Catalog No	Main Article Description	Capacity (mL)	Diameter d (mm)	Height h (mm)	Remarks
241701907	NS 29/32	50	51	105	Non-DIN/ISO size.
241702706	NS 29/32	100	64	105	–
241703702	NS 29/32	250	85	140	–
241704604	NS 29/32	500	105	163	–
241705609	NS 29/32	1000	131	200	–
241706305	NS 29/32	2000	166	240	–

NS4 45/40

Catalog No	Main Article Description	Capacity (mL)	Diameter d (mm)	Height h (mm)	Remarks
241704707	NS 45/40	500	105	163	Non-DIN/ISO size.
241705703	NS 45/40	1000	131	200	Non-DIN/ISO size.
241706408	NS 45/40	2000	166	240	Non-DIN/ISO size.
241707207	NS 45/40	4000	207	290	–

Specification

Diameter d (mm) : 66
Diameter (mm) : 66
Thread : GL 45
Color : blue-yellow
Colour : blue-yellow
Material : PP, PTFE, Silicone
Height (mm) : 38
Autoclavable : Yes

Available Options

Thumbnail	SKU	Description	Stock	Price	Quantity
	2417026	Round Bottom Flask 100ml Socket 24/29		RM1,543.00	DURAN® Round Bottom Flask with Standard Ground Joint quantity
	2417036	Round Bottom Flask 250ml Socket 24/29 (Box of 10pcs)		RM1,797.00	DURAN® Round Bottom Flask with Standard Ground Joint quantity