Merck PTE 4+

Merck KGaA (Darmstadt, Germany)

Designed for iPad

    • 4.7 • 287 Ratings
    • Free



The periodic table in digital form, interactive and at a glance – entirely free of charge.

Immediately find any imaginable information about an element, calculate molar masses of any compounds you like, facilitate your overview with infographics, compare atomic radii, masses, electronegativities, and much more!

After over a million downloads, now with extended functions, improved features and the visual image of our new Merck design (inspired by the colorful and multifaceted shapes seen under a microscope, the logo and colors now follow the concept of a vibrant science and technology company) – lively and dynamic.
Based on the idea of a lively science and technology company and inspired by the colorful and multifaceted shapes seen under a microscope, the new corporate design shows itself in expressive colors and shapes of a natural scientific impression. These are also represented in our new company logo.


The Merck PSE App is the ultimate tool for every friend of chemistry - whether pupil or teacher, student or professor, amateur or expert, hobbyist or technician. Our app is a must-have of digital periodic tables. Get informed with our mobile reference work, any time, with ease, offline and in detail.
Thanks to the many hours of work, experiences, reviews and user feedbacks on our first PSE App (with over a million downloads!) we are now able to provide the new, improved and more appealing version of the Merck PSE App.
Even more features. Even more improvements. Even more user friendliness.
Download now free of charge and start experimenting.

• 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, basic state, ionization energy, isotopic composition, state of matter, hardness according to Mohs, 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 the app.

• Economical handling of access rights

• Variety of languages
German, English, French, Spanish

• Interactive operating system
Smart operating elements and numerous selection options

Questions? Feedback? Suggestions? – You can reach us at

What’s New

Version 2.2.0

iOS optimization - Stability and performance update to new operating systems.

Ratings and Reviews

4.7 out of 5
287 Ratings

287 Ratings

Epitaxy ,

Gute App, die oft weiterhilft

Gute App die bei täglicher Arbeit und im allgemeinen ein guter hilfreicher Begleiter sein kann.
Leider hängt sich die App seit dem letzten Update immer komplett auf. Die Darstellung lässt sich nicht mehr vom Bildschirm entfernen und das I phone muss neu gestartet werden. Sollte dringend verbessert werden, aber sonst ist die App inhaltlich und vom Informationsgehalt sehr gut gelungen.

Tralveller ,

Tolle App! 👍🏻

Übersichtlich, Filtermöglichkeiten, weitergehende Informationen; eine App die ich schon seit längerem gesucht und nun endlich gefunden habe! Verbesserung: Filtermöglichkeit nach Entdeckungsjahr: auf dem iPhone könnten +/- für Wechsel des Jahres größer und schneller reagierend sein, zudem wäre bei Auswahl der Jahreszahl gut, wenn man diese auch manuell eintippen könnte. Auch der Link "App-Support" im App-Store-Bereich müsste aktualisiert werden, da dieser offensichtlich nicht mehr aktuell ist, Danke 👍🏻

Kiwimili ,


Ich habe viel mehr bekommen, als ich erwartet habe! Wenn man auf ein Element tippt, bekommt man alle nötigen Informationen dazu, einschließlich des Entdeckers! Es ist schön einfach und übersichtlich gestaltet und perfekt zum Lernen! 5 Sterne absolut verdient!

App Privacy

The developer, Merck KGaA (Darmstadt, Germany), has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.

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