DURAN is a brand name for the internationally defined borosilicate glass 3.3 (DIN ISO 3585) produced by the German company DURAN Group GmbH since 2005 under license from the Schott AG, which was the first to develop it, and which sold it from 1893 until the equity carve-out of the DURAN Group in 2005. Because of its high resistance to heat and temperature changes, as well as its high mechanical strength and low coefficient of thermal expansion, DURAN, which Pyrex from Corning is similar to, is not only used for laboratory devices (e.g. components of chemical devices, beakers, Erlenmeyer flasks, etc.) but also in cathode ray tubes, transmitting tubes, and speculums. This glass was developed by Otto Schott in 1887. In 1938 the brand DURAN was subscribed at the Reichspatentamt and registered in 1943. Milestones 1887: Otto Schott invented the glass 1943: The brand was registered for patent under the trade name DURAN 1950: DURAN borosilicate glass tubing became and has remained the standard material in the production of laboratory glass items 2011: SCHOTT Tubing in Mitterteich, Germany, was the first to produce DURAN tubing with a length of 10 meters, making it the longest industrially produced glass tube 2015: SCHOTT in Mitterteich set a world record by manufacturing DURAN tubing with an outside diameter of 460 mm, the largest ever industrially produced glass tubing 2017: DURAN Group is now DWK Life Sciences. Properties High chemical resistance Outstanding transmission properties High thermal capacity and resistance to thermal shock Strong electrical insulator transparency in the visible and infrared range of the electromagnetic spectrum High resistance to scratches Easily cleaned smooth surface Applications Laboratory devices Product presentation Giftware Explosion proof lighting Interior design Sprinkler fuses Photobioreactors for ideal algae growth Heat exchangers Sight glasses Ventilation systems Glass Kettles Water Pipes Duran is currently available in hollow glass products. It is either formed by a molding process into final glass products like Erlenmeyer flasks or drawn as a tube by SCHOTT Tubing. Such tubes are typically a semi-finished product for further processing, which provide higher precision in its cylindrical geometry and better optical clarity than molded hollow glassware. References External links Duran-Group.com Laboratory Glassware German brands Glass trademarks and brands