This entry presents 8-Hydroxyquinoline (C9H7NO; CAS 148-24-3; PubChem CID 1923) as a 3D-printable ball-and-stick model in which every atom carries its engraved element symbol (C, H, N, O), so the model can be read without a colour key. Atomic coordinates come from the PubChem-computed 3D conformer (not an experimental crystal structure); coordinates and connectivity are unchanged.

Biological relevance: 8-Hydroxyquinoline is recorded as a chelating agent; students can locate its ring nitrogen and phenolic hydroxyl group on the model (source: Wikidata Q270162, retrieved 2026-10-10).

Structure at a glance

• 18 atoms: 9 C, 7 H, 1 N, 1 O

• 19 bonds: 8 single, 11 aromatic

• Two 6-membered rings, fused along a shared edge, both aromatic

• Functional groups: one phenolic hydroxyl group (Ar-OH) and one pyridine-type ring nitrogen

• One hydrogen-bond donor and two acceptors (computed)

• No carbon atom is sp3-hybridised

Use in teaching

• Counting task: students tally the engraved symbols (9 C, 7 H, 1 N, 1 O; 18 atoms) and rebuild the formula C9H7NO from the model alone.

• Aromaticity: identify the two aromatic rings and the 11 bonds recorded as aromatic.

• Functional groups: find the phenolic hydroxyl group (Ar-OH) and the pyridine-type ring nitrogen on the model and name each one.

File and printing

STL mesh of 251,112 triangles, a closed (watertight) single solid. Coordinates are in ångström and STL stores no unit, so scale the model deliberately in your slicer. Measured bounding box: 5.929 × 5.947 × 5.279 Å; at scale factor 10 (1 Å to 10 mm, file read in millimetres) the print measures about 59.3 × 59.5 × 52.8 mm. SHA-256: b6a0139cda618ebaeeaa5a8d8ff5655f30dc76fd869962a21569f37e60488509.

Validation

• InChIKey identical to the PubChem record (PubChem FTP SDF, file dated 2026-10-08): MCJGNVYPOGVAJF-UHFFFAOYSA-N

• Molecular formula and hydrogen-bond donor/acceptor counts identical to PubChem

• Mesh: triangle count in the header equals the actual count; 0 edges not shared by exactly two triangles; 1 connected solid; SHA-256 equal to the published file

Source, licence and identifiers

Full record: molgod.org/molecule/148-24-3 · Licence and provenance record: molgod.org/licenses/stl/148-24-3 · Same file on Wikimedia Commons: File:8-Hydroxyquinoline-3D-molecular-model-engraved-CAS-148-24-3.stl

• MolGod ID: MG_259-537-449-58

• Wikidata: Q270162

• EC number: 205-711-1

• ChemSpider ID: 1847

• IUPAC name: quinolin-8-ol

• InChIKey: MCJGNVYPOGVAJF-UHFFFAOYSA-N

• SMILES: C1=CC2=C(C(=C1)O)N=CC=C2

• Molar mass 145.16 g/mol (exact mass 145.052763847)

Licence: CC BY-SA 4.0 (licence text). Required attribution: "8-Hydroxyquinoline 3D model by MolGod.org — https://molgod.org/molecule/148-24-3/ — CC BY-SA 4.0".