About CompoundLookup

Our Mission

CompoundLookup was created with a simple goal: make chemistry data accessible to everyone, regardless of their expertise level. We believe that exploring chemical compounds shouldn't require memorizing complex molecular formulas.

Traditional chemistry databases like PubChem and ChemSpider are incredibly powerful tools, but they're designed for experts who already know exactly what they're looking for. If you want to find a compound, you need to know its exact formula (like C₆H₁₂O₆), its CAS number, or its IUPAC name.

But what if you're a student wondering "what compounds can I make with carbon and oxygen?" Or a researcher exploring all possible combinations of certain elements? That's where CompoundLookup comes in.

What Makes Us Different

• Element-Based Search: Select elements from the periodic table and instantly see all compounds in our database.
• No Data Collection: We don't store any user data. No accounts, no tracking, no cookies for personalization. Everything happens in your browser.
• Massive Database: Over 7.5 million compounds organized into 200,000+ unique element combinations. All data is sourced from PubChem and updated regularly.
• Completely Free: CompoundLookup is free to use, forever. No subscriptions, no premium tiers, no paywalls.

How It Works

1. We index PubChem data and organize compounds by their element composition.
2. You select elements using our interactive periodic table.
3. Instant results show all compounds with those elements, including molecular formula, IUPAC name, molecular weight, and a direct link to PubChem.

Who Is This For?

• Students: Learning chemistry and exploring what compounds different elements can form.
• Educators: Teaching chemistry concepts and demonstrating element interactions.
• Researchers: Exploring compound possibilities before detailed research.
• Curious Minds: Anyone interested in chemistry who wants to explore and learn.

Data Attribution

All compound data displayed on CompoundLookup is sourced from PubChem, maintained by the National Center for Biotechnology Information (NCBI), a division of the National Library of Medicine (NLM) at the National Institutes of Health (NIH).