Significant growth in the Analytical Service business which reflects the value of measured physicochemical properties in ADME decision-making. Sirius sponsored a successful LogP2004 meeting in Zurich, where we exhibited four posters concerning our latest research, including our new MDM cosolvent method, and work to show correlations between measured PAMPA permeability and logP dodecane-water. In April, we discovered a remarkable new way to measure intrinsic solubility of ionisable compounds by automated potentiometric titration. By September, we launched CheqSol Solubility software for RefinementPro2, as well as FastD-PAS for high throughput UV pKa measurement on GLpKa + D-PAS, generating a substantial amount of interest. After several years of collaboration, Sirius and pION Inc. decided to go their separate ways. The latter part of the year saw Sirius preparing for the launch of Sirius Analytical Inc. In preparation, we had our first independent exhibition booth at AAPS in Baltimore in November 2004.