Acetic acid 3D Molecular Model — CAS 64-19-7

Model Overview & Print Notes

Summary Acetic acid (C2H4O2, CAS 64-19-7) — 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. Ordinary molecular STL files leave students guessing, because the colour scheme that identifies atoms on screen does not survive printing. Each atom of a MolGod model is engraved with its element symbol, turning a plain print into a self-explaining teaching object. We design these models so that students can name every atom straight away and concentrate on connectivity, bond types and shape. Instead of building a model from scratch, a teacher can go straight from the molecule's name to a file in the slicer. The research behind the idea, and how we plan to test it, is described at The story behind these engraved molecule models . Acetic acid is a chain molecule with no ring: 7 bonds (6 single and 1 double) connect its 8 atoms. Counting task: 2 C + 4 H + 2 O gives 8 engraved spheres; can the class rebuild the formula C2H4O2 from the model alone? Functional groups to find on the model: carboxylic acid group (-COOH). Topics it supports in class: the carbonyl group (C=O). Natural follow-up models: acetone (CAS 67-64-1) and Butanedione (CAS 431-03-8), close enough in structure for a spot-the-difference task. Free for education: MolGod.org publishes engraved molecular models for teachers, students and schools. Teachers: give each table a model and have students write the formula from the engraved atoms. Download it, print it and use it in your teaching. Publishing pictures, materials or remixes of it? Under CC BY-SA 4.0, name "MolGod.org" as the author, link back to the original and to the licence, mark your changes and keep remixes under the same terms. A ready-made attribution is included below. There is no registration, no payment and no obligation to rate it. Did it help your lesson? Write us a short review in the comments and tell us what would make the next molecule even better for students (or contact us at Ask us for another molecule ). Questions about the chemistry behind this molecule are welcome too: start a discussion in the comments and we will happily join in. Our service starts from a CAS number: you name the compound, we turn it into an engraved, printable 3D model. Full record and more free models: Molecule page for Acetic acid (CAS 64-19-7) Licence & provenance: Where this Acetic acid model comes from and how you may use it Same file on Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Acetic_acid-3D-molecular-model-engraved-CAS-64-19-7.stl A ball-and-stick model of Acetic acid 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: 102,598 triangles, closed (watertight) single solid. Coordinates in ångström (STL stores no unit) — scale the model deliberately in your slicer. Names in other languages: Essigsäure (de); acide acétique (fr); acido acetico (it); azijnzuur (nl); kwas octowy (pl); 乙酸 (zh). Chemical identity CAS Registry Number: 64-19-7 Molecular formula: C2H4O2 Molar mass: 60.05 g/mol (exact mass 60.021129366) IUPAC name: acetic acid MolGod ID: MG_880-286-414-97 ( Acetic acid under MolGod ID MG_880-286-414-97 ) PubChem CID: 176 ( https://pubchem.ncbi.nlm.nih.gov/compound/176 ) Wikidata: Q47512 ( https://www.wikidata.org/wiki/Q47512 ) EC number: 200-580-7 ChemSpider ID: 171 InChIKey: QTBSBXVTEAMEQO-UHFFFAOYSA-N SMILES: CC(=O)O Required attribution (CC BY-SA 4.0): "Acetic acid 3D model by MolGod.org — https://molgod.org/molecule/64-19-7/ — CC BY-SA 4.0" Licence text: https://creativecommons.org/licenses/by-sa/4.0/ Instructions STL mesh: 102,598 triangles, closed (watertight) single solid. Coordinates in ångström (STL stores no unit) — scale the model deliberately in your slicer.