Sunset yellow (also called food yellow 3 free acid, Food Yellow No. 5) has the formula C16H12N2O7S2 and a molar mass of 408.4 g/mol. The model above is PubChem's computed 3D conformer: drag to rotate, scroll to zoom, and use the measurement tools to read bond lengths and angles.
Explore in 3D Space-filling model PubChem
| IUPAC name | 6-hydroxy-5-[(4-sulfophenyl)diazenyl]naphthalene-2-sulfonic acid |
|---|---|
| SMILES | C1=CC(=CC=C1N=NC2=C(C=CC3=C2C=CC(=C3)S(=O)(=O)O)O)S(=O)(=O)O |
| PubChem CID | 17731 |
| Other names | food yellow 3 free acid, Food Yellow No. 5, FD and C Yellow No. 6 |
Atoms use the standard CPK colors: carbon gray, hydrogen white, oxygen red, nitrogen blue, sulfur yellow. Switch to Spacefill to see the molecule's overall shape and size, or Stick for a clear view of the bonds. Click two atoms in distance mode to measure a bond length in ångströms.
3D coordinates are PubChem's computed conformer, one low-energy shape of the molecule. Flexible molecules can take many other shapes.