Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

National Institute of Allergy and Infectious Disease
NIH 3D
FAQsBioArt

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

NIH3D

Ammonia - engraved ball-and-stick model (CAS 7664-41-7)

Created by
MolGod
Created:
10/15/26
Submitted:
10/14/26
Published:
10/15/26
Engraved ball-and-stick STL of Ammonia (CAS 7664-41-7), PubChem-computed conformer, coordinates in angstrom
ammonia-3d-molecular-model-engraved-cas-7664-41-7Engraved ball-and-stick STL of Ammonia (CAS 7664-41-7), PubChem-computed conformer, coordinates in angstrom

Select an image below to view

Engraved ball-and-stick STL of Ammonia (CAS 7664-41-7), PubChem-computed conformer, coordinates in angstrom

Learn more about NIH 3D workflow outputs

3DPX-023755

Licensing:

CC-BY-SA
How to cite this NIH 3D entry
22
3
Version 1

Category

Small Molecules
Small Molecules
Description

This entry presents Ammonia (H3N; CAS 7664-41-7; PubChem CID 222) as a 3D-printable ball-and-stick model in which every atom carries its engraved element symbol (H, N), so the model can be read without a colour key. Atomic coordinates come from the PubChem-computed 3D conformer (not an experimental crystal structure); coordinates and connectivity are unchanged.

Structure at a glance

  • 4 atoms: 3 H, 1 N

  • 3 bonds, all single

  • No rings (open-chain structure)

  • One hydrogen-bond donor and one acceptor (computed)

Use in teaching

  • Counting task: students tally the engraved symbols (3 H, 1 N; 4 atoms) and rebuild the formula H3N from the model alone.

File and printing

STL mesh of 38,454 triangles, a closed (watertight) single solid. Coordinates are in ångström and STL stores no unit, so scale the model deliberately in your slicer. Measured bounding box: 1.848 × 1.793 × 2.047 Å; at scale factor 10 (1 Å to 10 mm, file read in millimetres) the print measures about 18.5 × 17.9 × 20.5 mm. SHA-256: 6fb69c04c68ceec4d05fda851f476208a570a93becc1fc20e4f71b548db5eb65.

Validation

  • InChIKey identical to the PubChem record (PubChem FTP SDF, file dated 2026-10-08): QGZKDVFQNNGYKY-UHFFFAOYSA-N

  • Molecular formula and hydrogen-bond donor/acceptor counts identical to PubChem

  • Mesh: triangle count in the header equals the actual count; 0 edges not shared by exactly two triangles; 1 connected solid; SHA-256 equal to the published file

Source, licence and identifiers

Full record: molgod.org/molecule/7664-41-7 · Licence and provenance record: molgod.org/licenses/stl/7664-41-7 · Same file on Wikimedia Commons: File:Ammonia-3D-molecular-model-engraved-CAS-7664-41-7.stl

  • MolGod ID: MG_380-302-726-03

  • Wikidata: Q4087

  • EC number: 231-635-3

  • ChemSpider ID: 217

  • IUPAC name: azane

  • InChIKey: QGZKDVFQNNGYKY-UHFFFAOYSA-N

  • SMILES: N

  • Molar mass 17.031 g/mol (exact mass 17.026549100)

Licence: CC BY-SA 4.0 (licence text). Required attribution: "Ammonia 3D model by MolGod.org — https://molgod.org/molecule/7664-41-7/ — CC BY-SA 4.0".

Source Data Details
Attribution Instructions
3D Printing Instructions