Oxygen O2 Molecule black filled icon
Two outlined circles beside the numeral 2 forming the oxygen O2 chemical formula
About the Oxygen O2 Molecule black filled icon
Two open circles of unequal size sit beside a bold numeral 2, spelling out the chemical formula for oxygen as a simple atomic pair. The larger sphere carries a curved inner highlight that reads as a bubble of gas. Use it in medical and respiratory care dashboards, hospital signage, air purifier and air quality apps, chemistry lesson slides, and diving or industrial gas supplier sites.
The composition is diagonal: a small circle top right, a bigger one bottom left, and a numeral 2 balancing the right edge, so it stays legible when scaled down. Pair it with lungs, oxygen tank, nitrogen and molecule icons from the science set. At 16 px keep the stroke weight even so the two circles do not merge.
This is the solid black filled version of the oxygen o2 molecule icon: a bold silhouette that reads clearly at 16-24 px and on dark or busy backgrounds, and prints well in one colour.
It downloads free as an SVG vector or transparent PNG in seven sizes, and the free online editor lets you recolor it, apply gold, silver, neon and gradient styles, add animation, or convert it to EPS, PDF and DXF.
Free for personal and commercial use with attribution.
