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

Stock Photo:
Image ID: 64553920
Copyright:
Small
500x333 6.9"x4.6" (72dpi) 98 KB
Med
1000x666 3.3"x2.2" (300dpi) 321 KB
Large
3688x2458 12.3"x8.2" (300dpi) 2.1 MB
Super
7376x4916 24.6"x16.4" (300dpi) approx.6.3 MB
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