Overview: All SPI Supplies Brand PTFE beakers are chemically inert, non-contaminating, and are thermally stable in the range of -200°C (390°F) to + 280°C (+536°F). The beakers also have a "super smooth" finish making it virtually impossible for anything to "stick" to the surface of these fine laboratory products.
Details of the manufacturing: The beakers are isostatically molded from pure virgin PTFE resulting in a highly inert material, one that will stand up to nearly everything one might want to put into it. The super smooth internal finish means that virtually nothing will really stick to it. The base is precision machined for good heat transfer on a hot plate. Each beaker has a built in convenient pouring lip to minimize the chances of dripping or splashing.
Cautions about over heating: PTFE beakers can not be taken to temperatures as high as glass. The user has to be sure they do not overheat PTFE beakers. If PTFE is overheated, especially in air, it can start to break down by both thermal decomposition and oxidation, resulting in fumes of HF which should not be inhaled under any circumstances.
