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Chemistry Lookup

Compounds, elements, and safety

Chemistry Lookup gives you instant access to chemical compound data, periodic table elements, and GHS safety information. Search by name, CAS number, formula, or partial match โ€” and get back everything from molecular structure to hazard codes in one place.

It draws on PubChem, the world's largest open chemistry database, covering millions of compounds with verified data. Whether you're checking the safety profile of a substance, comparing elements for a materials choice, or finding structurally similar compounds for a synthesis route, everything is one lookup away.

What you can do

  • compound_lookup โ€” full molecular data for any compound: formula, weight, IUPAC name, SMILES, InChI key, and physical properties
  • safety_data โ€” GHS hazard pictograms, signal word, H-codes and P-codes for any substance
  • element_info โ€” detailed data for any periodic table element by name, symbol, or atomic number
  • search_compounds โ€” partial-name search when you don't know the exact compound name
  • similar_compounds โ€” find structurally related compounds by name or SMILES string
  • compare_elements โ€” place two or more elements side by side on key properties

Who it's for

Chemists, researchers, lab technicians, students, and safety professionals who need reliable compound and element data without hunting through multiple databases. Also useful for anyone writing safety documentation or handling hazardous materials.

How to use it

  1. Use compound_lookup with a name like "aspirin", a CAS number like "50-78-2", or a formula like "C9H8O4"
  2. Follow with safety_data to get the GHS hazard classification for the same compound
  3. Use similar_compounds to explore structurally related substances
  4. For element questions, use element_info with the element name, symbol, or atomic number

Information

Price
Free

Frequently Asked Questions

Can I look up a compound by name, formula, or CAS number?

Yes. `compound_lookup` accepts any of those inputs and returns molecular formula, molecular weight, IUPAC name, SMILES, InChI key, and common synonyms.

Can I get hazard information for handling or labeling?

`safety_data` returns GHS hazard details, including pictogram codes, signal word, H-codes, and P-codes for the compound you are checking.

Can I compare elements side by side?

`compare_elements` shows two periodic table elements next to each other, including atomic mass, density, melting and boiling points, electronegativity, and electron configuration.

What if I only know part of the compound name?

Use `search_compounds` to find partial-name matches, or `similar_compounds` when you want structurally related compounds based on a name or SMILES string.

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