DSC Investigation of some Testing and Calibration Compounds, Particularly During Cooling

Two compounds are described with interesting properties for use in DSC. The first compound is adamantane (C₁₀H¹⁶), with a reversible solid-solid transition at 208.62 K 1], suitable for DSC calibration at this low temperature 2]. The second compound is 4,4'-azoxyanisole (C₁₄H₁₄N₂O₃), with a liquid crystal range between 390 and 407 K 3]. This compound shows two transitions on heating, with a large heat effect at 390 K and a small heat effect at 407 K. For this reason, this substance is well suitable for testing the sensitivity and the resolution of DSC instruments 4]. For both compounds not only the heating, but also the cooling behaviour is investigated.This revised version was published online in November 2005 with corrections to the Cover Date.