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Search for Species Data by Chemical Formula. Please follow the steps below to conduct your search (Help): Enter the desired chemical formula (e.g., C4H*Cl):


Chemical Compounds Lookup by Name or Formula.


PubChem Structure Search. ... Search By: Name/ Text, Identity/ Similarity, Substructure/ Superstructure, Molecular Formula, 3D Conformer, Saved Search ...


Organic Chemistry Portal · Chemicals >> Quick Search, Structure Search. Chemical Search Engine. Enter a name, molecular formula or cas number: ...


Search by Structure or Substructure. Upload a structure file or draw using a molecule editor.


ChemSpider is a free chemical structure database providing fast access to over 34 million structures, properties and associated information.


Search by Systematic name, Synonym, Trade name, Registry number, SMILES or InChI.


Search Type. Substructure, Identity. Exact, Fragment. Similarity %. Search Options. Stereo. Tautomer. Total Hits. 50, 100, 200, 300, 500. Help. Clear. Search  ...


Although many resources have a molecular formula search option, molecular formulas are far from unique, retrieving anywhere from a few to thousands of ...