47.5 MB (4.8 MB compressed)
3328 x 4992 pixels
28.2 x 42.2 cm ⏐ 11.1 x 16.6 in (300dpi)
PHIL DEGGINGER / SCIENCE PHOTO LIBRARY PHIL DEGGINGER / SCIENCE PHOTO LIBRARY
Cobalt Chloride solution at room temperature. A common use for cobalt(II) chloride was for the detection of moisture. A concentrated aqueous solution is red at room temperature, but becomes blue when heated.
Model release not required. Property release not required.