Hand holding test tube with pH indicator comparing color to scale

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Size: 3887px × 2592px
Photo credit: © Shawn Hempel / Alamy / Afripics
License: Royalty Free
Model Released: Yes

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