CAS Number to Structure
Look up a CAS Registry Number and view the matching 2D chemical structure, SMILES, formula, molecular weight, and PubChem CID.
Quick answer: Enter a CAS number such as 64-17-5 or 7732-18-5. The page resolves a PubChem record and displays the chemical structure image.
Structure image appears here.
How CAS to Structure Lookup Works
CAS numbers are resolved through public PubChem synonym records. The tool then uses the matching PubChem CID to display a 2D structure image and metadata.
- Verify the result for salts, mixtures, hydrates, and ambiguous registry records.
- Use the SMILES value to open the compound in MolDraw or convert it to other identifiers.