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

Look up a chemical compound by name, CAS number, or formula. Returns molecular formula, weight, IUPAC name, SMILES notation, InChI key, and common synonyms from PubChem.

Returns: Compound properties including molecular formula, weight, IUPAC name, SMILES, InChI key, and common synonyms
Safety Data

Get GHS hazard classification and safety data for a chemical compound. Returns pictogram codes, signal word, hazard statements (H-codes), and precautionary statements (P-codes).

Returns: GHS classification including pictograms, signal word, hazard statements (H-codes), and precautionary statements (P-codes)
Element Info

Look up a periodic table element by name, symbol, or atomic number. Returns atomic mass, category, phase, density, melting/boiling point, electron configuration, and discovery info.

Returns: Element data including atomic mass, category, phase, density, melting/boiling point, electron configuration, and discovery info
Search Compounds

Search for chemical compounds matching a partial name. Uses PubChem autocomplete to find compounds when the exact name is unknown. Returns a list of matching compound names.

Returns: List of compound names matching the search query
Similar Compounds

Find compounds structurally similar to a given compound using 2D fingerprint similarity from PubChem. Accepts a compound name or SMILES string and returns similar compounds with their properties.

Returns: Structurally similar compounds with IUPAC names, formulas, weights, and SMILES notation
Compare Elements

Side-by-side comparison of two periodic table elements. Compare atomic mass, density, melting/boiling points, electronegativity, electron configuration, and more.

Returns: Side-by-side comparison of two elements including atomic mass, density, melting/boiling points, electronegativity, and electron configuration
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v0.012026-03-22
  • Initial release with 6 skills: compound_lookup, safety_data, element_info, search_compounds, similar_compounds, compare_elements

Chemistry Lookup Use Cases(3)

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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.