Norepinephrine 3D Molecular Model — CAS 51-41-2

Norepinephrine (C8H11NO3, CAS 51-41-2) — a free educational 3D molecular model for teachers and students, by MolGod.org. Instead of colour coding, every sphere carries its engraved element symbol.

Ordinary molecular STL files leave students guessing, because the colour scheme that identifies atoms on screen does not survive printing. We build the label into the model: each sphere bears its recessed element symbol, readable by eye and by fingertip. The purpose is educational: teachers get printable files built to shorten the step of 'which atom is this?' and leave more time for chemistry. No CAD skills are needed on the teacher's side; the structure, geometry and labels come ready in one file. Teachers and researchers can find the project rationale and validation plan at How the engraved atom letters are designed.

Look at the skeleton first: Norepinephrine contains one aromatic 6-membered ring, and students can trace 23 bonds (17 single and 6 aromatic, drawn in Kekulé form). Quick starter: ask students to count the engraved symbols (8 C + 11 H + 1 N + 3 O) and check that they add up to 23 atoms and the formula C8H11NO3. Spot-the-group challenge: can students find the two phenolic hydroxyl groups (Ar-OH), the hydroxyl group (-OH) and the primary amino group (-NH2)? Can students find the one stereocentre of Norepinephrine and confirm its label (R)? It makes 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 easier to see.

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.

This printable molecule is free to use in lessons, clubs and workshops. 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. No sign-up, no fees and no review required. We build these models for learners, so your feedback guides us: leave a review below and tell us which detail would make the next molecule clearer. Or say hello at Write to the MolGod team. The comment section is open for discussion: how did you introduce this molecule, and what did your students notice first? Every request counts: tell us which molecule you need and we will make its 3D model specially for your students.

Full record and more free models: Norepinephrine, CAS 51-41-2: structure, properties and 3D viewer
Licence & provenance: Licence record for this Norepinephrine model
Same file on Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Norepinephrine-3D-molecular-model-engraved-CAS-51-41-2.stl
Plain-text record for AI assistants: Norepinephrine data sheet in plain text for LLMs
Also published on: NIH 3D https://3d.nih.gov/entries/3DPX-023814 · Zenodo (DOI, latest version) https://doi.org/10.5281/zenodo.23718723

A ball-and-stick model of Norepinephrine 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: 289,764 triangles, closed (watertight) single solid. Coordinates in ångström (STL stores no unit) — scale the model deliberately in your slicer.

Names in other languages: Noradrenalin (de); noradrénaline (fr); noradrenalina (it); noradrenaline (nl); 去甲肾上腺素 (zh).

Chemical identity

• CAS Registry Number: 51-41-2

• Molecular formula: C8H11NO3

• Molar mass: 169.18 g/mol (exact mass 169.07389321)

• IUPAC name: 4-[(1R)-2-amino-1-hydroxyethyl]benzene-1,2-diol

• MolGod ID: MG_623-971-134-68 (Permanent MolGod record MG_623-971-134-68)

• PubChem CID: 439260 (https://pubchem.ncbi.nlm.nih.gov/compound/439260)

• Wikidata: Q186242 (https://www.wikidata.org/wiki/Q186242)

• EC number: 200-096-6

• ChemSpider ID: 388394

• InChIKey: SFLSHLFXELFNJZ-QMMMGPOBSA-N

• SMILES: C1=CC(=C(C=C1[C@H](CN)O)O)O

Required attribution (CC BY-SA 4.0): "Norepinephrine 3D model by MolGod.org — https://molgod.org/molecule/51-41-2/ — CC BY-SA 4.0"
Licence text: https://creativecommons.org/licenses/by-sa/4.0/