Stirring bars using rare earth magnets have significantly increased magnetic strength compared to those using Alnico magnets, but more importantly they are almost totally resistant to demagnetisation.
Stir bars using rare earth magnets are identified by a carbon black spot which us chemically inert.
Other Notes
The high magnetic coupling power of rare earth stir bars may cause abrasion of the PTFE coating against the base of the container and where stirring arrays are used, as in multi-well plates, lateral interaction between stirrer bars may be observed.
Choose from one of the most recent versions:
Certificates of Analysis (COA)
Lot/Batch Number
It looks like we've run into a problem, but you can still download Certificates of Analysis from our Documents section.
Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.