Test Tube black outline icon

About the Test Tube black outline icon

This icon shows a test tube tilted diagonally, with a wavy line inside suggesting liquid contents, a rounded closed bottom, and a flared rim at the open end. It represents chemistry, lab testing, and scientific analysis. Use it in chemistry apps, biology course material, lab inventory tools, pharma branding, and science education content.

The diagonal tilt and curved liquid line give the tube a sense of motion and volume, distinguishing it from an upright glassware icon. It pairs with the Flask, Microscope, and Petri Dish icons in the library. Small sizes still read clearly thanks to the simple flared-rim silhouette.

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.