Oxygen O2 Bubbles black outline icon
Outline O2 symbol made of a large circle, a subscript 2 and two small bubbles
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About the Oxygen O2 Bubbles black outline icon
A large open circle stands in for the letter O, followed by a numeral 2 at subscript height, while two smaller rings float above like rising bubbles. Together they read as the oxygen molecule and suggest breathing, fresh air and life support. Useful in medical and respiratory app interfaces, hospital wayfinding, diving and aquarium products, air purifier packaging, and chemistry or science teaching material.
Composition is deliberately unbalanced: the main ring anchors the lower left, the two bubbles step diagonally upward, and the thin numeral keeps the formula legible. Stroke weight stays even across every circle. It pairs with oxygen tank, lungs, molecule and air quality icons. Use at 32 px or above so the small 2 does not blur.
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.
