The original DURAN® Erlenmeyer flasks are predestined for use in the laboratory due to their outstanding properties, such as very good chemical resistance, almost inert behaviour and a high service temperature. In addition, due to their uniform wall thickness distribution, they are characterized by minimal thermal expansion and, as a result, high thermal shock resistance. DURAN® Erlenmeyer flasks are therefore particularly suitable for work at very high temperatures and rapid temperature changes. In the field of food technology, the degree of saturation of fats is determined on the basis of the iodine value. Iodine is added to a reaction solution, which adds up to double bonds of the fatty acids contained in the solution. The more iodine has to be added, the more unsaturated fatty acids are contained in the solution. This test is ideally carried out in an iodine number flask which, due to its conical shape, is well suited for mixing several components.