This entry presents Glycidol (C3H6O2; CAS 556-52-5; PubChem CID 11164) as a 3D-printable ball-and-stick model in which every atom carries its engraved element symbol (C, H, 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.

Structure at a glance

• 11 atoms: 3 C, 6 H, 2 O

• 11 bonds, all single

• One 3-membered ring

• Functional groups: one hydroxyl group (-OH) and one epoxide ring (three-membered C-O-C ring)

• One stereocentre; configuration not defined in the source record (no R/S label) — IUPAC name oxiran-2-ylmethanol

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

• Every carbon atom is sp3-hybridised (tetrahedral)

Use in teaching

• Counting task: students tally the engraved symbols (3 C, 6 H, 2 O; 11 atoms) and rebuild the formula C3H6O2 from the model alone.

• Stereochemistry: locate the stereocentre; the source record defines no configuration, so the printed conformer should not be read as a specific stereoisomer.

• Functional groups: find the hydroxyl group (-OH) and the epoxide ring (three-membered C-O-C ring) on the model and name each one.

File and printing

STL mesh of 131,496 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: 4.53 × 3.954 × 3.453 Å; at scale factor 10 (1 Å to 10 mm, file read in millimetres) the print measures about 45.3 × 39.5 × 34.5 mm. SHA-256: 4e744e7d6c48834951209c7c88f58482a27c2b7a9d2da7d1ac36c2f472bea5c8.

Validation

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

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

• Stereocentres in PubChem: 0 defined, 1 undefined; both counts match this record

• 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/556-52-5 · Licence and provenance record: molgod.org/licenses/stl/556-52-5 · Same file on Wikimedia Commons: File:Glycidol-3D-molecular-model-engraved-CAS-556-52-5.stl

• MolGod ID: MG_785-546-757-47

• Wikidata: Q418265

• EC number: 209-128-3

• ChemSpider ID: 10691

• InChIKey: CTKINSOISVBQLD-UHFFFAOYSA-N

• SMILES: C1C(O1)CO

• Molar mass 74.08 g/mol (exact mass 74.036779430)

Licence: CC BY-SA 4.0 (licence text). Required attribution: "Glycidol 3D model by MolGod.org — https://molgod.org/molecule/556-52-5/ — CC BY-SA 4.0".