Ethanolamine, C₂H₇NO, 141-43-5, 3D Ethanolamine to print

Ethanolamine (C2H7NO, CAS 141-43-5) — a free educational 3D molecular model for teachers and students, by MolGod.org. Each atom is labelled with its own engraved element symbol: no colour chart needed.

Teachers who print molecules quickly meet the same gap: the file defines spheres and sticks, but not which element each sphere stands for. MolGod engraves the element symbol directly into every atom sphere, so the identity of each atom is part of the geometry itself. Our goal as an education project: free files for teachers, designed so that students recognise atoms at a glance and spend their attention on bonds and structure. Preparation time drops for the teacher too: there is nothing to model, colour or annotate before sending the file to the printer. Read why we engrave the atoms, and which studies inspired the project: How the engraved atom letters are designed.

Ask the class whether Ethanolamine contains a ring. It does not: 11 atoms and 10 bonds (all of them single) make up an open structure. Use the engraved letters like a register: call out each element and tick it off until the class reaches 2 C + 7 H + 1 N + 1 O (11 atoms altogether). Before any theory, let students hunt on the model for the hydroxyl group (-OH) and the primary amino group (-NH2). It makes alcohols and hydrogen bonding, as well as amines and basicity easier to see. Students who finish early can look up N-(2-Hydroxyethyl)ethylenediamine (CAS 111-41-1) and Ethylene Glycol (CAS 107-21-1), the closest neighbours in the collection, and list what differs.

This model is part of the free MolGod.org collection of engraved molecules for education. 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. There is no registration, no payment and no obligation to rate it. We'd love to hear from you! Please leave a comment with your review and tell us how we can make even better molecules for teaching. You can also reach us at Write to the MolGod team. Have an idea for a lesson built around this molecule? Share it in the comments so other teachers can use it too. Need another molecule? Contact us and we will prepare a 3D model specially for you, starting from its CAS number.

Full record and more free models: Ethanolamine, CAS 141-43-5: structure, properties and 3D viewer
Licence & provenance: Licence record for this Ethanolamine model
Same file on Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Ethanolamine-3D-molecular-model-engraved-CAS-141-43-5.stl
Plain-text record for AI assistants: Ethanolamine data sheet in plain text for LLMs
Also published on: NIH 3D https://3d.nih.gov/entries/3DPX-023846 · Zenodo (DOI, latest version) https://doi.org/10.5281/zenodo.24083154

A ball-and-stick model of Ethanolamine 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: 118,674 triangles, closed (watertight) single solid. Coordinates in ångström (STL stores no unit) — scale the model deliberately in your slicer.

Names in other languages: Monoethanolamin (de); éthanolamine (fr); etanolammina (it); 2-aminoethanol (nl); etanoloamina (pl); 乙醇胺 (zh).

Chemical identity

• CAS Registry Number: 141-43-5

• Molecular formula: C2H7NO

• Molar mass: 61.08 g/mol (exact mass 61.052763847)

• IUPAC name: 2-aminoethanol

• MolGod ID: MG_963-431-362-74 (Permanent MolGod record MG_963-431-362-74)

• PubChem CID: 700 (https://pubchem.ncbi.nlm.nih.gov/compound/700)

• Wikidata: Q410387 (https://www.wikidata.org/wiki/Q410387)

• EC number: 205-483-3

• ChemSpider ID: 13835336

• InChIKey: HZAXFHJVJLSVMW-UHFFFAOYSA-N

• SMILES: C(CO)N

Required attribution (CC BY-SA 4.0): "Ethanolamine 3D model by MolGod.org — https://molgod.org/molecule/141-43-5/ — CC BY-SA 4.0"
Licence text: https://creativecommons.org/licenses/by-sa/4.0/