A Safety Guide For Using Laboratory Heating Blocks

Heating blocks provide a safe, convenient and productive alternative to heating mantles and oil baths for heating round bottomed flasks, tubes and vials. Used in combination with a standard hotplate stirrer - heating blocks have proved themselves with their ability to outperform the heat-conducting properties of oil baths. They pose a far lower fire risk and their use makes the clean-up of glassware far easier as there is no residual oil contamination on the outside of the flasks. In addition to accelerating your chemical reactions - heating blocks ensure a safer, cleaner, healthier working environment.
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References

http://www.labmanager.com/lab-health-and-safety/2013/12/a-safety%20guide%20for%20using%20laboratory%20heating%20blocks#.VhsGmeyqqko http://img.directindustry.es/images_di/photo-g/calentador-bloque-doble-tubo-ensayo-63431-6322193.jpg