Chemical Tube black outline icon
Test tube with liquid in the lower half and bubbles rising from the open top
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About the Chemical Tube black outline icon
A round-bottomed test tube stands upright with a thick collar rim, liquid filling its lower half behind an uneven surface line, two bubbles suspended inside and two more escaping above the mouth. It reads instantly as a reaction in progress and fits chemistry lessons, laboratory and research sites, medical testing flows, pharmaceutical pages and science app navigation.
The narrow vertical body and wide rim give it a clear silhouette at small sizes, while the circular bubbles break up the empty upper section. Combine it with flask, microscope and molecule icons for a matching lab set, and place it at 32 px or larger so the tiny bubbles survive.
This is the black outline version of the chemical tube icon: even, monoline strokes that stay crisp at small sizes and suit clean, minimal interfaces, wireframes and light backgrounds.
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.
