35.4 MB (6.4 MB compressed)
2815 x 4396 pixels
23.9 x 37.3 cm ⏐ 9.4 x 14.7 in (300dpi)
CHARLES D. WINTERS / SCIENCE SOURCE / SCIENCE PHOTO LIBRARY CHARLES D. WINTERS / SCIENCE SOURCE / SCIENCE PHOTO LIBRARY
Alka Seltzer dissolving in water. Alka-Seltzer contains three active ingredients, aspirin (acetylsalicylic acid) (ASA), sodium bicarbonate, and anhydrous citric acid. The aspirin is a pain reliever and anti-inflammatory, and the sodium hydrogen carbonate and citric acid form an antacid by their effervescent reaction with water.
Model release not required. Property release not required.