Description

This entry presents Benzene (C6H6; CAS 71-43-2; PubChem CID 241 (https://pubchem.ncbi.nlm.nih.gov/compound/241)) as a 3D-printable ball-and-stick model in which every atom carries its engraved element symbol (C, H), 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. Unlike 3DPX-003334 (https://3d.nih.gov/entries/3DPX-003334), this model is engraved for colour-independent reading in the classroom. Biological relevance: Benzene is recorded both as a carcinogen and as an occupational carcinogen, as well as a male reproductive and developmental toxicant (source: Wikidata Q2270 (https://www.wikidata.org/wiki/Q2270), retrieved 2026-10-10). Structure at a glance 12 atoms: 6 C, 6 H 12 bonds: 6 single, 6 aromatic One aromatic 6-membered ring No hydrogen-bond donors or acceptors (computed) No carbon atom is sp3-hybridised Use in teaching Counting task: students tally the engraved symbols (6 C, 6 H; 12 atoms) and rebuild the formula C6H6 from the model alone. Aromaticity: identify the aromatic ring and the 6 bonds recorded as aromatic. File and printing STL mesh of 157,530 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: 4.151 × 4.381 × 4.945 Å; at scale factor 10 (1 Å to 10 mm, file read in millimetres) the print measures about 41.5 × 43.8 × 49.5 mm. SHA-256: fce817164a2d6d50bea63e4f5ffde46b9e4211ed363517fc327fac7bbde897bf. Validation InChIKey identical to the PubChem record (PubChem FTP SDF, file dated 2026-10-08): UHOVQNZJYSORNB-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/71-43-2 (https://molgod.org/molecule/71-43-2/?utm_source=nih3d&utm_medium=referral&utm_campaign=edu-3d-models) · Licence and provenance record: molgod.org/licenses/stl/71-43-2 (https://molgod.org/licenses/stl/71-43-2/) · Same file on Wikimedia Commons: File:Benzene-3D-molecular-model-engraved-CAS-71-43-2.stl (https://commons.wikimedia.org/wiki/File:Benzene-3D-molecular-model-engraved-CAS-71-43-2.stl) MolGod ID: MG_386-938-392-24 (https://molgod.org/id/MG_386-938-392-24) Wikidata: Q2270 (https://www.wikidata.org/wiki/Q2270) EC number: 200-753-7 ChemSpider ID: 236 IUPAC name: benzene InChIKey: UHOVQNZJYSORNB-UHFFFAOYSA-N SMILES: c1ccccc1 Molar mass 78.11 g/mol (exact mass 78.0469501914) Licence: CC BY-SA 4.0 (licence text (https://creativecommons.org/licenses/by-sa/4.0/)). Required attribution: "Benzene 3D model by MolGod.org — https://molgod.org/molecule/71-43-2/ — CC BY-SA 4.0".