Organic Chemistry Portal
Tools >> Molecular Property Explorer

OSIRIS Property Explorer

The OSIRIS Property Explorer lets you draw chemical structures and calculates on-the-fly various drug-relevant properties whenever a structure is valid. Prediction results are valued and color coded. Properties with high risks of undesired effects like mutagenicity or a poor intestinal absorption are shown in red. Whereas a green color indicates drug-conform behaviour.

System Requirements

A working Java Runtime Environment (JRE) installed on your computer. Latest JRE can be downloaded from

Privacy Information

If you draw chemical structures in Property Explorer, information is kept locally on your computer. The prediction databases is part of the app. However, for converting a chemical name, CAS-number or SMILES string to a structure, some text information is sent to servers in Switzerland and a structure is returned.


Thomas Sander, Idorsia Pharmaceuticals Ltd, Hegenheimermattweg 91, 4123 Allschwil, Switzerland, Email:

Data Warrior

You can also download the Data Warrior, which calculates similar values and helps you to manage a huge amount of molecules from the author's homepage

Data Warrior