The Merck PSE App is the ultimate tool for every friend of chemistry – whether pupil or teacher university student or professor amateur or expert hobbyist or technician. Our app is the must-have of digital periodic tables. Get informed with our mobile reference work any time with ease offline and in detail in the usual straightforward user-friendly way. 

Download now free of charge and start experimenting.

All existing features:

• All important information about the elements: atomic number valence electrons oxidation state electronegativity according to Allred-Rochow and Pauling atomic mass boiling point melting point atomic radius density history discoverer classification crystalline structure type electron configuration ionization energy isotopic composition state of matter hardness according to Mohs basic state oxidation numbers percentage of mass in Earth’s crust year of discovery half-life and much more.
• Visualized element properties: atomic radius atomic radius graphic electronegativity (according to Allred-Rochow and Pauling) ionization energy relative atomic mass state of matter ranking list of properties discovery classifications.
• Molar mass calculator: simple entry field for chemical formulas. Calculate molar mass simply and quickly.
• Offline use. No Internet needed. All contents in one app. 
• Streamlined handling of access rights.
• Interactive operation: smart operating elements and numerous selection options.
• Variety of languages: German English French and Spanish.