Structure PNG: 19 free images
Skeletal formulas of drug molecules and simple heterocycles, a pulley worksheet, a studio flat floor plan, a dimensioned outdoor shower, a swing-wing jet in wireframe and a pen drawing of a stone church.
- Images
- 19
- Sizes
- 601 to 2 400 px
- Formats
- PNG with alpha, WebP, JPG
- Download
- free, no sign-up
Filters
Chemistry Chemical compound Curcumin PNG
Isoquinoline Naphthalene Aromaticity Simple PNG
Quinoline Ether Chemical compound Chemistry PNG
Acridine Chemical structure Simple aromatic PNG
Estrogen receptor Aromaticity Chemical PNG
Short-chain dehydrogenase Reductase Enzyme PNG
Interleukin 9 Interleukin 4 Crystal PNG
Panavia Tornado ADV Aircraft Dassault PNG
Hepatitis C virus Grazoprevir Chemical PNG
Pulley Simple machine Laboratory Paper PNG
Lactam Aromaticity Indole Heterocyclic PNG
Drawing Apple, sketch apple PNG
Christian Reformed Church in North America PNG
CURCH, cartoon, silhouette PNG
Na het bezoek Swimming pool Shower Door PNG
The Riviera Wongamat Real Estate Studio PNG
Green string illustration, White Line art PNG
Protein Data Bank in Europe (PDBe) PNG
Melanocortin 4 receptor Melanocortin PNG
Chemical structures
Most of the page is organic chemistry drawn as line formulas: acridine, chromene, a small nitrogen ring and several long drug molecules with amide and ether links. They are black on transparent, so they sit on a slide or a white page without cleanup.
Structures you can build
The floor plan, the shower column with its supply lines and the jet in top and side projection are technical drawings with measurements or grids — useful for a manual, a property listing or a blueprint backdrop.
Loose fits
The cross-hatched apple, the church sketch and the triangle monogram share only a precise linear style with the rest; the word reached them through the source's keywords.
Questions and answers
Are all structure images really transparent?
All 19 images carry a real alpha channel. On the image page you can switch the backdrop to white or dark to see the edges.
What sizes are available?
Originals range from 601 to 2 400 pixels. On download you can shrink to 64–1024 px; enlarging beyond the original is not offered.
How many files can I download?
No sign-up needed. The file is served after a short wait on the download page.
What is the licence?
Personal and educational projects — freely. For commercial use check the rights with the original source, especially for logos, characters and photos of people.