3-Mercaptopropionic Acid 3D Molecular Model — CAS 107-96-0

3-Mercaptopropionic Acid (C3H6O2S, CAS 107-96-0) — a free educational 3D molecular model for teachers and students, by MolGod.org. Every sphere shows which element it is through an engraved symbol, not a colour code.

Plain ball-and-stick prints look the same for every element: the STL format has no way to say which ball is carbon and which is oxygen. The MolGod approach puts the information where students look for it, on the atom: every sphere is engraved with its symbol. We design these models so that students can name every atom straight away and concentrate on connectivity, bond types and shape. No CAD skills are needed on the teacher's side; the structure, geometry and labels come ready in one file. Background, references and the planned classroom study: How the engraved atom letters are designed.

There is not a single ring in 3-Mercaptopropionic Acid; 12 atoms are linked by 11 bonds in an open chain (10 single and 1 double). Use the engraved letters like a register: call out each element and tick it off until the class reaches 3 C + 6 H + 2 O + 1 S (12 atoms altogether). Where on the model can students see the carboxylic acid group (-COOH)? Let them search before you reveal the answer. Topics it supports in class: the carbonyl group (C=O). Place it beside succinic acid (CAS 110-15-6) and adipic acid (CAS 124-04-9) and ask students which features are shared and which are not.

Teachers and students can use this MolGod.org model free of charge. Teachers: let students set the model beside a skeletal formula and list what the drawing omits.

This printable molecule is free to use in lessons, clubs and workshops. When you publish a photo, a worksheet or a remix, CC BY-SA 4.0 requires you to credit "MolGod.org" as the author of the model, link to the original and to the licence, indicate any changes and share remixes under the same licence (the ready attribution line is below). Nothing else is needed: no account, no cost, no compulsory feedback. Every review helps us refine the models for students. Tell us what you think in the comments, or reach us 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? 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: 3-Mercaptopropionic Acid, CAS 107-96-0: structure, properties and 3D viewer
Licence & provenance: Licence record for this 3-Mercaptopropionic Acid model
Same file on Wikimedia Commons: https://commons.wikimedia.org/wiki/File:3-Mercaptopropionic_Acid-3D-molecular-model-engraved-CAS-107-96-0.stl
Plain-text record for AI assistants: 3-Mercaptopropionic Acid data sheet in plain text for LLMs
Also published on: NIH 3D https://3d.nih.gov/entries/3DPX-023843 · Zenodo (DOI, latest version) https://doi.org/10.5281/zenodo.24071960

A ball-and-stick model of 3-Mercaptopropionic 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: 154,974 triangles, closed (watertight) single solid. Coordinates in ångström (STL stores no unit) — scale the model deliberately in your slicer.

Names in other languages: 3-Mercaptopropionsäure (de); kwas 3-merkaptopropionowy (pl); 3-巯基丙酸 (zh).

Chemical identity

• CAS Registry Number: 107-96-0

• Molecular formula: C3H6O2S

• Molar mass: 106.15 g/mol (exact mass 106.00885060)

• IUPAC name: 3-sulfanylpropanoic acid

• MolGod ID: MG_817-884-626-20 (Permanent MolGod record MG_817-884-626-20)

• PubChem CID: 6514 (https://pubchem.ncbi.nlm.nih.gov/compound/6514)

• Wikidata: Q11751618 (https://www.wikidata.org/wiki/Q11751618)

• EC number: 203-537-0

• ChemSpider ID: 6267

• InChIKey: DKIDEFUBRARXTE-UHFFFAOYSA-N

• SMILES: C(CS)C(=O)O

Required attribution (CC BY-SA 4.0): "3-Mercaptopropionic Acid 3D model by MolGod.org — https://molgod.org/molecule/107-96-0/ — CC BY-SA 4.0"
Licence text: https://creativecommons.org/licenses/by-sa/4.0/