Hand dripping pH indicator into test tube with visible color change in test fluid

---

Size: 3688px × 2458px
Photo credit: © Shawn Hempel - Concepts / Alamy / Afripics
License: Royalty Free
Model Released: Yes

Keywords: alkaline, analysis, blue, change, checking, chemical, chemistry, chlorine, color, control, diagnosis, examination, fluid, glass, glove, hand, hold, indicator, kit, measure, measuring, neutral, paper, ph, reaction, research, scale, science, test, testing, tube, water