Dichloromethane 3D Molecular Model — CAS 75-09-2

Dichloromethane (CH2Cl2, CAS 75-09-2) — 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.

On a typical printed molecule every sphere is the same anonymous ball, since the STL file cannot transmit the usual colour convention. MolGod adds what the STL format leaves out by engraving the element symbol into each atom of the printed structure. 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. Teachers skip the modelling and labelling work entirely: download the file, set the scale in the slicer and print. Curious about the science behind the engraving? The project page is at How the engraved atom letters are designed.

No ring closes anywhere in Dichloromethane, which makes it a good open-chain example: 5 atoms, 4 bonds, all of them single. How many atoms can the class find? The engraved spheres give 1 C + 2 H + 2 Cl, so the answer should be 5. Ask the class to locate the two C-Cl bonds and name each one. Students meeting organohalogen compounds and carbon-halogen bonds for the first time can hold an example in their hands. Its closest structural relatives in the MolGod.org collection are 1,2-Dichloroethane (CAS 107-06-2) and Allyl chloride (CAS 107-05-1); printing them side by side makes a quick compare-and-contrast exercise.

MolGod.org shares these models for free to make chemistry tangible in the classroom. Teachers: pass the model round at the start of the lesson, before showing any diagram.

This printable molecule is free to use in lessons, clubs and workshops. CC BY-SA 4.0 sets four simple conditions for anything you publish with it: credit "MolGod.org" as the model's author, link the original and the licence, say what you changed, and share derivatives alike. Copy the attribution line below to get it right. Nothing else is needed: no account, no cost, no compulsory feedback. 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. Feel free to discuss the model here, compare notes with other educators, or contact us; every conversation helps us build better teaching models. All we need is a CAS number: from it MolGod generates the 3D structure, engraves every atom and prepares the STL.

Full record and more free models: Dichloromethane, CAS 75-09-2: structure, properties and 3D viewer
Licence & provenance: Licence record for this Dichloromethane model
Same file on Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Dichloromethane-3D-molecular-model-engraved-CAS-75-09-2.stl
Plain-text record for AI assistants: Dichloromethane data sheet in plain text for LLMs
Also published on: Zenodo (DOI, latest version) https://doi.org/10.5281/zenodo.23969927

A ball-and-stick model of Dichloromethane 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: 68,528 triangles, closed (watertight) single solid. Coordinates in ångström (STL stores no unit) — scale the model deliberately in your slicer.

Names in other languages: Dichlormethan (de); dichlorométhane (fr); diclorometano (it); dichloormethaan (nl); chlorek metylenu (pl); 二氯甲烷 (zh).

Chemical identity

• CAS Registry Number: 75-09-2

• Molecular formula: CH2Cl2

• Molar mass: 84.93 g/mol (exact mass 83.9533555)

• IUPAC name: dichloromethane

• MolGod ID: MG_592-039-634-84 (Permanent MolGod record MG_592-039-634-84)

• PubChem CID: 6344 (https://pubchem.ncbi.nlm.nih.gov/compound/6344)

• Wikidata: Q421748 (https://www.wikidata.org/wiki/Q421748)

• EC number: 200-838-9

• ChemSpider ID: 6104

• InChIKey: YMWUJEATGCHHMB-UHFFFAOYSA-N

• SMILES: ClCCl

Required attribution (CC BY-SA 4.0): "Dichloromethane 3D model by MolGod.org — https://molgod.org/molecule/75-09-2/ — CC BY-SA 4.0"
Licence text: https://creativecommons.org/licenses/by-sa/4.0/