Description
Magnetic stirring bar 70 x 9 mm is a cylindrical laboratory stir bar for reliable mixing in beakers, flasks and similar vessels on magnetic stirrers. It measures 70 mm in length and 9 mm in diameter and combines a magnetic core fully encapsulated in polytetrafluoroethylene (PTFE) with smooth outer surfaces and an integrated centre ring. The PTFE coating provides broad chemical resistance to many solvents and reagents used in analytical, synthetic and quality-control work. Packed in units of 10 pieces and available from manufacturer Marienfeld, these round-rod stir bars support stable rotation and consistent mixing performance. The centre ring helps keep the bar centred, reduces friction against vessel walls and contributes to quieter running at typical laboratory speeds. Smooth PTFE surfaces simplify cleaning and help limit sample carry-over between successive runs. This size suits medium-volume vessels where a durable, chemically inert stirring element is required for everyday laboratory applications.
This article is part of Magnetic stirring bars, in Stirring, shaking & mixing.
Key features
- Pack size: 10 pc(s)
- Length: 70 mm
- Diameter: 9 mm
- Shape: Cylindrical rod with centre ring
- Material: Polytetrafluoroethylene (PTFE)
- EAN: 4250317315021
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Questions about Magnetic stirring bars 70x9 mm,
What is this article?
Magnetic stirring bars 70x9 mm, is the article on this page. Luminix Health distributes Marienfeld for laboratory use. It sits in Barreaux d'agitation magnétiques, inside Agitation, secouage & mélange, in Instruments de laboratoire.
A magnetic stirring bar is the magnet coated in PTFE that spins inside a vessel, driven by a stirrer underneath. Length and shape, plain, oval or cross, have to suit the flask. A bar left against a dry glass wall will grind it.
Stirring keeps a mixture uniform or helps a solid dissolve. A magnetic stirrer spins a bar inside a closed vessel. An overhead stirrer drives a shaft when the liquid is viscous or the volume is large. A vortex mixer agitates a tube. A shaker moves a whole rack or a plate. The shape of the impeller and the speed decide whether the liquid turns over or merely spins. The vessels being stirred are indexed under ISO laboratory glassware.
Which category should I open next?
The category is Agitation, secouage & mélange. The sub-category is Barreaux d'agitation magnétiques. The catalogue is Instruments de laboratoire.
Shelves beside this one are Arbres d'agitation, hélices & turbines, Agitateurs magnétiques, Accessoires d'agitation & de mélange, Homogénéiseurs & disperseurs, Agitateurs, basculeurs & rotateurs, Agitateurs suspendus and Mélangeurs vortex.
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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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.