Test Tube black outline icon
Tilted test tube filled with a sample and marked with graduation lines
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About the Test Tube black outline icon
A test tube lies on a 45-degree diagonal, its open rim outlined at the top and its rounded lower half solid with sample liquid, crossed by a ladder of short graduation marks. It stands for laboratory testing, chemical analysis and medical diagnostics, which fits science apps, clinic and lab websites, research reports, pharmacy pages and biology teaching material.
The diagonal angle fills the square frame and gives the small volume marks room to read, while the solid fill makes the sample level obvious. It groups well with flask, microscope, pipette and blood sample icons. At tiny sizes the graduations blur, so use 32px or larger.
This is the black outline version of the test tube 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.
