Oxygen O2 Bubbles black outline icon
Chemical formula O2 with two round bubbles rising above the letter
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About the Oxygen O2 Bubbles black outline icon
A large capital O with a subscript 2 spells the chemical formula for oxygen, and two round bubbles of different sizes rise above it. The mark communicates breathable air, oxygen therapy and dissolved oxygen, which suits medical device interfaces, hospital signage, air purifier packaging, water treatment diagrams, chemistry lessons and scuba diving apps.
Letterforms are geometric, with the O drawn as an even heavy ring and the 2 kept small enough to read as a subscript rather than a separate character. It pairs with carbon dioxide, lungs and nitrogen icons. Keep it above 32 px so the subscript stays legible.
This is the black outline version of the oxygen o2 bubbles icon: even, monoline strokes that stay crisp at small sizes and suit clean, minimal interfaces, wireframes and light backgrounds.
Get it free as an SVG vector or transparent PNG (16-512px), copy the SVG code, or restyle it in the free online editor — recolor any part, add gold, neon or gradient effects, animate it, or export EPS, PDF and DXF.
Free for personal and commercial use with attribution.
