Hand holding test tube with pH indicator comparing color to scale

• Contributor: Shawn Hempel - Concepts / Alamy Stock Photo
• Image ID: BW3KTT
• File size: 27 MB (630.7 KB Compressed download)
• Releases: Model - yes | Property - no
• Dimensions: 2508 x 3762 px | 21.2 x 31.9 cm | 8.4 x 12.5 inches | 300dpi
• Date taken: 6 November 2010

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