Draw a structure or build a reaction in the browser. For chemists and pharma engineers.
Draw a structure or load it from SMILES, a molfile or a name. Get formula, MW, exact mass, degree of unsaturation, cLogP, TPSA, Lipinski/Veber checks, and PNG/SVG/molfile export.
Open Tool → ⚗️Build A + B → C + D by name, SMILES or drawn structure. Atom balance and auto-balance, batch stoichiometry with limiting reagent and yield, main product vs by-products, atom economy and mass balance.
Open Tool →Chemistry (formula, molecular weight, valence, implicit hydrogens, SMILES parsing and generation) is computed by OpenChemLib, an established open-source cheminformatics library. IUPAC names, InChI and InChIKey are looked up from PubChem on request.