DR. HAROLD ROSE / SCIENCE PHOTO LIBRARY. DR. HAROLD ROSE / SCIENCE PHOTO LIBRARY.
Polarised light micrograph of crystals of salicylic acid, which is used as a mild disinfectant and antiseptic. Salicylic acid and some of its derivatives (the salicylates) are used as anti-rheumatic agents; acetylsalicylic acid's more common name is aspirin. Magnification: X 20 at 35mm size.
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