Search Compounds by Elements
CompoundLookup is the world's first and only tool that lets you discover chemical compounds by simply selecting elements. No formulas needed - just pick the elements you're interested in.
Select Elements
Click up to 5 elements from the periodic table, then click "View Compounds" to see results
How Element-Based Search Works
Traditional chemistry databases like PubChem and ChemSpider require you to know the exact molecular formula or compound name. But what if you're a student wondering "what compounds can I make with hydrogen and oxygen?" or a researcher exploring all possible combinations of certain elements?
That's exactly the problem CompoundLookup solves. We've indexed over 7.5 million compounds from PubChem and organized them by their element composition, creating 200,000+ unique element combinations. This means you can now search chemistry data in a way that was never possible before.
Simply click on elements in the periodic table below, and we'll instantly show you all known compounds containing those elements. Learn more about how to use the compound search or explore our knowledge base for chemistry fundamentals.
Popular Element Combinations
Not sure where to start? Here are some frequently searched element combinations. Click any combination to explore the compounds:
Why Element-Based Search Matters
For Students
Learning chemistry becomes intuitive when you can explore compounds by their building blocks. Discover what happens when different elements combine without needing to memorize formulas first. Check out our periodic table basics guide.
For Researchers
Quickly survey all known compounds containing specific elements. Perfect for preliminary research, literature reviews, or discovering compounds you didn't know existed. Learn about our data sources.
For Educators
Demonstrate chemistry concepts interactively. Show students real compounds formed by element combinations and link directly to detailed information on PubChem. Read our education guide.
For Curious Minds
Ever wondered what compounds contain gold and oxygen? Or what you can make with just carbon? CompoundLookup makes chemistry exploration accessible to everyone. Start with chemistry for beginners.
Data Sourced from PubChem
All compound data on CompoundLookup comes from PubChem, the world's largest free chemistry database maintained by the National Institutes of Health (NIH). We've indexed and organized this data to enable element-based searching - a feature not available on any other platform. We're constantly adding more compounds and improving our coverage. Learn more about our mission.