Oxygen O2 black filled icon
Large circle beside a bold numeral two with three small bubbles, forming the O2 formula
About the Oxygen O2 black filled icon
The chemical formula for oxygen is drawn as a large open circle standing in for the letter O beside a bold numeral two, with three small bubbles of different sizes floating around it. Useful for medical and respiratory apps, oxygen tank and cylinder labeling, air quality dashboards, chemistry lesson slides, and diving or altitude fitness content.
The main ring dominates the frame while the numeral sits low and heavy on the right, and the scattered bubbles fill the corners to balance the layout. It pairs with molecule, lungs and air purifier icons. Keep it at 32 px so the smallest bubbles survive.
This is the solid black filled version of the oxygen o2 icon: a bold silhouette that reads clearly at 16-24 px and on dark or busy backgrounds, and prints well in one colour.
Download it free as a scalable SVG vector or transparent-background PNG in seven sizes (16 to 512px), copy the SVG code straight into your project, or open it in the free online editor to change colors, apply gold, silver, neon and gradient styles, animate it, or convert it to EPS, PDF and DXF.
Free for personal and commercial use with attribution.
