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Stability of Screening Compounds in Wet DMSO
Caroline Engeloch*,
Ulrich Schopfer,
Ingo Muckenschnabel,
Francois Le Goff,
Hervé Mees,
Karoline Boesch,
and
Maxim Popov
* To whom correspondence should be addressed. E-mail: caroline.engeloch{at}novartis.com.
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Abstract |
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The impact of storage conditions on compound stability and compound solubility has been debated intensely over the past 5 years. At Novartis, the authors decided to opt for a storage concept that can be considered controversial because they are using a DMSO/water (90/10) mixture as standard solvent. To assess the effect of water in DMSO stocks on compound stability, the authors monitored the purity of a subset of 1404 compounds from ongoing medicinal chemistry projects over several months. The study demonstrated that 85% of the compounds were stable in wet DMSO over a 2-year period at 4 °C. This result validates the storage concept developed at Novartis as a pragmatic approach that takes advantage of the benefits of DMSO/water mixtures while mediating the disadvantages. In addition, the authors describe how purity data collected over the course of the chemical validation of high-throughput screening actives are used to improve the analytical quality of the Novartis screening deck. (Journal of Biomolecular Screening (XXXX:xx-xx)
First published on November 21, 2008, doi:10.1177/1087057108326536
Journal of Biomolecular Screening 2008;13:999.
A more recent version of this article appeared on December 1, 2008

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