Epinephrine 3D Molecular Model — CAS 51-43-4

Epinephrine (C9H13NO3, CAS 51-43-4) — a free educational 3D molecular model for teachers and students, by MolGod.org. No legend required: the element symbol is engraved on each atom.

Teachers who print molecules quickly meet the same gap: the file defines spheres and sticks, but not which element each sphere stands for. Each atom of a MolGod model is engraved with its element symbol, turning a plain print into a self-explaining teaching object. The project aims to let a student work out the arrangement of atoms, the bonds and the geometry of the molecule independently, without a colour key and without waiting for the teacher. It shortens the path from lesson plan to printed model, because no one has to build the molecule or add labels by hand. More about the hypothesis we are testing with these models: How the engraved atom letters are designed.

Start with the ring system: Epinephrine has one aromatic 6-membered ring; in total the model carries 26 bonds (20 single and 6 aromatic, drawn in Kekulé form). How many atoms can the class find? The engraved spheres give 9 C + 13 H + 1 N + 3 O, so the answer should be 26. Functional groups to find on the model: two phenolic hydroxyl groups (Ar-OH), hydroxyl group (-OH) and secondary amino group (-NH-). Can students find the one stereocentre of Epinephrine and confirm its label (R)? Teachers covering aromaticity and delocalised electrons, chirality, enantiomers and CIP (R/S) rules, alcohols and hydrogen bonding, phenols and hydrogen bonding, as well as amines and basicity will find it a concrete example.

Teachers and students can use this MolGod.org model free of charge. Teachers: give each table a model and have students write the formula from the engraved atoms.

Free to print and free to bring into any classroom. Sharing it somewhere? The licence (CC BY-SA 4.0) needs four things: "MolGod.org" credited as the creator, links to the original and to the licence, a mention of any changes, and adaptations released under the same licence. The attribution text below covers the first two. There is no registration, no payment and no obligation to rate it. Teachers and students, we read every comment. Tell us in a review how the model worked for you and what we could do better for education; for longer feedback write to Write to the MolGod team. Curious about bond angles, isomers or where this compound appears in everyday life? Ask below and let's discuss it together. Need a different molecule? Send us its CAS number and we will gladly prepare an engraved 3D model of it.

Full record and more free models: Epinephrine, CAS 51-43-4: structure, properties and 3D viewer
Licence & provenance: Licence record for this Epinephrine model
Same file on Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Epinephrine-3D-molecular-model-engraved-CAS-51-43-4.stl
Plain-text record for AI assistants: Epinephrine data sheet in plain text for LLMs
Also published on: Zenodo (DOI, latest version) https://doi.org/10.5281/zenodo.23718820

A ball-and-stick model of Epinephrine with each element symbol recessed into its atom sphere, generated by MolGod.org from a PubChem-computed 3D conformer (not an experimental crystal structure); atomic coordinates and connectivity are unchanged. STL mesh: 322,710 triangles, closed (watertight) single solid. Coordinates in ångström (STL stores no unit) — scale the model deliberately in your slicer.

Names in other languages: Adrenalin (de); adrénaline (fr); adrenalina (it); adrenaline (nl); 肾上腺素 (zh).

Chemical identity

• CAS Registry Number: 51-43-4

• Molecular formula: C9H13NO3

• Molar mass: 183.20 g/mol (exact mass 183.08954328)

• IUPAC name: 4-[(1R)-1-hydroxy-2-(methylamino)ethyl]benzene-1,2-diol

• MolGod ID: MG_950-326-813-09 (Permanent MolGod record MG_950-326-813-09)

• PubChem CID: 5816 (https://pubchem.ncbi.nlm.nih.gov/compound/5816)

• Wikidata: Q132621 (https://www.wikidata.org/wiki/Q132621)

• EC number: 200-098-7

• ChemSpider ID: 5611

• InChIKey: UCTWMZQNUQWSLP-VIFPVBQESA-N

• SMILES: CNC[C@@H](C1=CC(=C(C=C1)O)O)O

Required attribution (CC BY-SA 4.0): "Epinephrine 3D model by MolGod.org — https://molgod.org/molecule/51-43-4/ — CC BY-SA 4.0"
Licence text: https://creativecommons.org/licenses/by-sa/4.0/